Drug Geek
Bluelighter
There are some important notes provided under the dose page at Erowid as follows:
"Bromo-Dragonfly is a chemical which has very little history of human use and was used as a novel brain research chemical with rats in the mid 1990s at Purdue. When it was discovered to be active in rats, one of its important features was how potent it is. The doses used in rats (injected abdominally) were very small. A few years after the initial papers describing this chemical's activity in the brain, reports surfaced of human experimentation, suggesting oral activity well under 1 milligram. Some disputed these findings and said that Bromo-Dragonfly was only active under 1mg when injected.
In May 2005, a quantity of this chemical became available in some human experimental psychoactive markets. Erowid received a smattering of reports about its use and an increasing number of questions about it.
As of June 2006, we have received only 50-70 first-hand accounts of ingestion of Bromo-Dragonfly, only a few of these detailed enough to be considered full reports. The findings are very contradictory, with some people claiming strong oral activity at 300 micrograms (ug) of Bromo-Dragonfly, while others say they got virtually no effects at 1.5mg (1500 ug).
There may be two distinct "batches" of material: one more potent and one less. In 2006, most reports indicate that the dosage range for available material is 800-2000ug rather than the more potent batch of product sold as BromoDragonfly in 2005. In 2005, the more potent batch was sometimes called the "European" batch and the other batch as the "American", although this distinction is not in common use. It seems likely that they are not the same chemical, but it is impossible to know. Some blotter has been reported to have been dipped with Bromo-Dragonfly, some pills pressed, but mostly powder distributed from what little we can tell.
Also, there have been a growing number of reports of people saying that they got blotter that they thought was acid, but instead "definitely felt like something else". Generally, since there is no verification of the substance, these reports are ignored when trying to estimate dosage and effects of novel chemicals because they introduce too much noise and are prone to error.
Please note that with only a handful of reports of use, it is unsafe and unwise to assume that these are representative of how a chemical presumed to be Bromo-Dragonfly will affect other individuals. Please see the Research Chemical Vault for more information about chemicals for research that are sold for human consumption."
Given that the history of human use is incredibly short, and given that the documented history may not even be accurate with respect to the authenticity of the material and the doses taken, it appears that the level of knowledge of this substance and it's corresponding effects are sketchy at best.
Couple this with the vast variation of effects experienced by different people from the same substance, in different settings, and different doses, the answer becomes even less clear.
Also, to ask whether LSD and Bromo-dragonfly are "similar" has no real answer in any case, because the word 'similar' is undefined. To say that there is no similarity because one is a tryptamine and one is a phenethylamine really is not correct or incorrect. It is correct in one sense, when one is comparing only psychedelic substances, but clearly LSD is "similar" to say, 2C-E, when compared against say, heroin. So, an equivalent answer might be; of course they are similar, given that they are both psychedelic substances.
To say "LSD is fun", might also be perceived as a bizarre statement by many.
In sum, I have done nothing in the way of providing an answer to your question, only suggested that an answer to your question is hard to reach at this point in time.
So, you could always gift the community by trying both, then writing a comparitive trip report and post it here or on Erowid! To that, the community would be indebted I'm sure!
Peace. :D
"Bromo-Dragonfly is a chemical which has very little history of human use and was used as a novel brain research chemical with rats in the mid 1990s at Purdue. When it was discovered to be active in rats, one of its important features was how potent it is. The doses used in rats (injected abdominally) were very small. A few years after the initial papers describing this chemical's activity in the brain, reports surfaced of human experimentation, suggesting oral activity well under 1 milligram. Some disputed these findings and said that Bromo-Dragonfly was only active under 1mg when injected.
In May 2005, a quantity of this chemical became available in some human experimental psychoactive markets. Erowid received a smattering of reports about its use and an increasing number of questions about it.
As of June 2006, we have received only 50-70 first-hand accounts of ingestion of Bromo-Dragonfly, only a few of these detailed enough to be considered full reports. The findings are very contradictory, with some people claiming strong oral activity at 300 micrograms (ug) of Bromo-Dragonfly, while others say they got virtually no effects at 1.5mg (1500 ug).
There may be two distinct "batches" of material: one more potent and one less. In 2006, most reports indicate that the dosage range for available material is 800-2000ug rather than the more potent batch of product sold as BromoDragonfly in 2005. In 2005, the more potent batch was sometimes called the "European" batch and the other batch as the "American", although this distinction is not in common use. It seems likely that they are not the same chemical, but it is impossible to know. Some blotter has been reported to have been dipped with Bromo-Dragonfly, some pills pressed, but mostly powder distributed from what little we can tell.
Also, there have been a growing number of reports of people saying that they got blotter that they thought was acid, but instead "definitely felt like something else". Generally, since there is no verification of the substance, these reports are ignored when trying to estimate dosage and effects of novel chemicals because they introduce too much noise and are prone to error.
Please note that with only a handful of reports of use, it is unsafe and unwise to assume that these are representative of how a chemical presumed to be Bromo-Dragonfly will affect other individuals. Please see the Research Chemical Vault for more information about chemicals for research that are sold for human consumption."
Given that the history of human use is incredibly short, and given that the documented history may not even be accurate with respect to the authenticity of the material and the doses taken, it appears that the level of knowledge of this substance and it's corresponding effects are sketchy at best.
Couple this with the vast variation of effects experienced by different people from the same substance, in different settings, and different doses, the answer becomes even less clear.

Also, to ask whether LSD and Bromo-dragonfly are "similar" has no real answer in any case, because the word 'similar' is undefined. To say that there is no similarity because one is a tryptamine and one is a phenethylamine really is not correct or incorrect. It is correct in one sense, when one is comparing only psychedelic substances, but clearly LSD is "similar" to say, 2C-E, when compared against say, heroin. So, an equivalent answer might be; of course they are similar, given that they are both psychedelic substances.
To say "LSD is fun", might also be perceived as a bizarre statement by many.

In sum, I have done nothing in the way of providing an answer to your question, only suggested that an answer to your question is hard to reach at this point in time.
So, you could always gift the community by trying both, then writing a comparitive trip report and post it here or on Erowid! To that, the community would be indebted I'm sure!
Peace. :D