Ok, I'll bite....LSA is a complex of amides of lysergic acid. For starters you are comparing a group of chemicals to a single compound so the whole LSD comparison doesn't really work.
Second, of all the lysergamide-containing seeds...baby woodrose are the worst. There is actually a chart somewhere on Erowid that shows the different ratios of lysergamides in baby woodrose vs ololiuqui vs store bought heavenly blue and whatever is in the woodrose...it DOES make it a very crappy, body oriented high compared to authentic mexican morning glory, and to a lesser extent the morning glory bred for flowers. There are at least a half dozen active alkaloids here, and they vary from species to species...I also suspect they vary with age.
Another way of looking at it is....there is good pot, shitty pot, and ok stuff. The seeds are the same way.
That is not to say one can't have a psychedelic experience on woodrose seeds, but it is very different from the kind one gets on heavenly blue.
But above and beyond all, eating the seeds is not the way to go. For sure, it is a horrendous puke fest considering there are actual emetics (glycosides that the stomach does not like).
http://www.google.com/url?sa=t&rct=...5Whtk7oKll-boUJ5BAkHg-Q&bvm=bv.61190604,d.b2I
If one uses authentic ololiuqui seed, and prepared a tea...and prepares it along the lines of what Peter Webster recommends...a first rate psychedelic is obtained.
http://www.maps.org/old_forum/1999/msg00844.html
Other BLers are way more into this than I ever was, and a search should bring up some of the the post on ergine, and the 'active boat/chair' confirmations and such. Interesting stuff.
The seeds are not LSD but they do come from a magic plant of mexico and the seeds are held to a very high esteem. Some places in Oaxaca, the seeds are said to be preferred over mushrooms.