@deathly_hallowsPushmo was great on the handheld (and because of the 3D actually is better there). Mega Man 6 isn't great on the 3DS I think in part to it's graphics. Other games are great. I'm not delegating the 3DS as a B-tier system except so far in these two situations. Animal Crossing New Leaf plays great on 3DS and I'm more than happy playing it there, but then again, it uses the whole screen and was built for it.
So let me be clear I never said, nor implied, that 'every game is better on system A'. Is that what others are implying?