mdma is more in your face euphoria, unable to avoid, rushing body orgasmic feelings.
on lsd though it could be the opposite of euphoric at times, when i have the actual euphoria it feels like i have a bunch of energy inside of me and im a kid again and im gigglingmy fucking ass off and everything is ok in the world. not forced, but much more rewarding and much more real feeling.
its hard to say which has "more" euphoria, we might have different definitions of the word- on mdma there is probably more(quantitative) euphoria, but on lsd the euphoria it gives is the happiest ive ever felt (qualititative). the thing about lsd is that you cant go into it looking for euphoria and get it out the other side quite as easily as you can with mdma.
you should search around a lil, im sure someone has asked this question (or something similar) before.