The games play alright in most cases (*cough* AlteredBeast) but they do a lacklustre job with graphic tiles. Take a look at a scene from arcade GnG and its SuperGrafx counterpart:
The tree has 11 colours in the arcade (I had a paint program count them for me), but the tree in the SGX has colours that can be counted with the eye alone. 5 colours.
With a little massaging of the palette, the full range can still be kept, even on the lowly SGX/PCE.
SGX GnG has half the number of colours as the arcade version, but it isn't the hardware's fault. The same kind of sloppy conversion runs through the rest of GnG, 1941, Forgotten Worlds, etc.
Anyway, Strider ACD was developed by an outside company (Dice Creative), so NEC Avenue's failings possibly didn't enter into it anymore.