Anybody viewing this thread who has a question about ANY version of Double Dragon should just head over to: www.classicgaming.com/doubledragon
They have a full review of every official Double Dragon game ever released (original and sequels), regardless of the platform, including mobile phone versions and obscure computer versions. Spectrum, C64, Amiga, NES, Game Gear, PC Engine, Arcade versions, whatever. It's there. They might be missing the hacks, homebrews and possibly the XBLA version but those are inconsequential.
Here is what you are looking for regarding the 7800 version:
http://doubledragon.classicgaming.ga...mparisons.html
http://doubledragon.classicgaming.ga...d/rdd7800.html