I think this is a major point that is surprisingly left out of many of the 'Mac vs X' debates. [The thought that goes in to 3rd party GUI apps, not their websites]
It is amazing how well-designed Mac apps are in general — it's a shame the trend doesn't really seem to have translated quite as well to the iPhone. Don't get me wrong, some iPhone apps are amazingly well-designed — I guess it's probably down to most Mac apps (at least the ones I use) being produced by indie software houses that really care about experience, whereas most apps on Windows et al are generally developed by large corporations that don't care as much about their apps' aesthetic, and on the iPhone it's those big companies employing outside contractors that are never going to care as much.
Also, that may well be the longest sentence ever penned.
Beyond Compare 3 -- which I'm a really happy user of -- seems to be much more powerful. For example, it can actually merge files. And there's clearly been a ton of attention paid to its design.
Beyond compare if fantastic. If you miss it that much then you can run it nicely under Wine/Darwine/Crossover etc. I've been using Deltawalker on the Mac which is nice if a little brittle sometimes. It sucks hugely for FTP/SFTP compares though.
Even though two users have already raved about Beyond Compare, I can't stop myself but join the chorus and announce that BC3 is FANTASTIC! If a text compare program doesn't have a 'bottom' status bar like Beyond Compare, I won't use it. Period.
