Its not exactly the same, however, 2-Br-LSD seems to be related chemically to LSD, does it not? MDMA isn't similar to Meth, however, are they not both amphetamines as well as stimulants? They are definitely not the same, however, MDMA is closer to Meth than say, Heroin...People get stimulation both just as it is obvious that people have a psychedelic experience from both 2-Br-LSD. People also have psychedelic experiences from LSD-25.
MDMA doesn't have meth in it just because it has "methamphetamine" in "methylenedioxylmethamphetamine" but you can't say "oh gosh, they're in no way similar because they're not the same exact chemical."