I like there are two versions of your hack PARADOX. That brings up, in my opinion, fresh challenges and features. And like you said, varied differences between the two is always welcomed in my book. Also, Black and White actually have specified differences, so I don't see why you shouldn't create two different, yet similar hacks. Block out all those nay-sayers and do what you choose. I'll be waiting for the first beta of either game, ready to enjoy the hell of it.
One more thing...Happy New Year dude!