You've never compared the Strike series much, if you think the SuperNes versions are identical.
Having played both through to completion several times over the years (Also including most other versions of Jungle Strike and the other games in the franchise), the SuperNes version is definitely noticeably enhanced. Even more so with Urban Strike (I wasn't able to find a good video of the SuperNes version).
And Desert Strike is at least as good as the Genesis original, although it doesn't really push the system any. But they're fine, well programmed games and a sad reminder of how good Electronic Arts once was. That the SuperNes versions aren't radically different isn't an indictment of them since they weren't meant to be, but they also didn't lazily just ignore the capabilities of the system or do sloppy conversions, either.