Originally Posted by
Barone
The MD version simply has a lot more going on screen all the time, bigger sprites, better tile variability for each stage, etc.
The charged shots, for an example, were cut from the SNES version and they are supposed to look big. One could argue they couldn't fit them in the cartridge (which has 8 Mbit just like the MD one) but its ROM has like 14-15 KB of empty space that could store the required animation.
The whole "Oh, you can't compare both 'cause the SNES version is a re-imagination for the console public" argument sounds like bullshit to me. I think the Data East developers simply struggled to port the arcade game and decided to re-design it as a bummer version of it that could fit in what they were capable of doing with the SNES hardware at the time.
'Cause even the sections which are very similar to the arcade/MD version show far less concurrency and variability of enemies on screen. Things are more sparsely presented even if the graphics for those objects and enemies appear in the game at some point.