No 6-APB is MDA-like and has a trippy side to it. It also is not the topic of discussion, sorry. Please go here where it has it's own thread and there is plenty to read about it:
http://www.bluelight.ru/vb/threads/599863
If a drug has empathogenic, warm feelings, euphoria and/or is stimmy that doesn't immediately make it 'rolly' i.e. it is way too simplistic to make comparisons like that.
2C-B has clasically been described as a crossover between LSD and MDMA but unlike a combination of both. It's the best description if you don't have a frame of reference but you should consider it as a drug in itself and read up about it - don't just assume that if it should has some resemblance to other drugs that guarantees anything.
Well there are 2C's that have marked empathogenesis, warmth and euphoria (most I've tried) while others like 2C-E are more plainly psychedelic, serious intellectual sharp and deep.
2C-I is one that does make me feel warm and glowing but also sharp, edgy and a bit empty in content. Superficially it has some qualities that at first do remind of some positive sides of stimulants but everyone considering trying it should realize it can also have uncomfortable sides of it as well as unexpected effects.
The shortest I can put it is: on paper 2C-I sounds pretty good, but in practice I was very disappointed in the actual experiences.
Comparing to MDMA is not the way to approach this, it's just a different drug. It probably won't help you and at worst it may leave you unprepared for 2C-I.