I had a Euphoria and, while it is a really good piece, it did tend to come off the spot pretty hard for me.
Having thrown the Euphoria, and having seen several AMP's, I would tend to believe the AMP would be the smoother of the two.
Now, while it probably is the smoother of the two, it may still be stronger as far as the oil volume it can handle. I can't really speak to that end of things, but it would be my suspicion that it is.