Is there a difference between cartridge and CD in terms of PQ where the game is on both? I assume the CD has audio CD quality sound? I can't see why there would be much difference especially as the CD was 1X speed.
There is no difference in terms of graphics. The difference lies only in the quality of sound and BGM. The NGCD was marketed to lower the price of software, making it much cheaper than AES. Additionally, some games include additional modes like artwork, and there are exclusive games that were only released for NGCD.
