Hehe, very interesting read.
Just looking at the games, the NES seems to be more "powerful", maybe not in terms of raw processing power, but the thing is, some of the games are just phenomenal and makes me think of 7800 can handle it (like Super Mario 3).
Not saying 7800 sux, b/c I bought that OVER a NES/SMS so many years ago. I have been an Atari fan so I thought they would come out with some great games... Xevious really wowed me and was worth the wait (I bought Joust and Food Fight with the system). Still, the NES version later on seems to be alittle cleaner and crisper.
In any case, I am still amazed by the a little 2600 game called Solaris... Anyone else?