Both Rondo and Symphony on DXC use a sprite filter that you cannot toggle off, which just about ruins the spritework. It's very unfortunate. I guess tastes always vary, but no way in hell does that smudge look better than crisp pixels to any righteous eye.
There are also alterations in the sound effects (if I recall: try item crashing with the axe), which while relatively minor, you do notice. And they're always worse!