Looking around competing Android device forums I'm seeing quite a mix as to how the two S4 versions are being handled: everything from basically two entirely different devices altogether, to one forum named for both (with discussion most often pointing out which version is being referred to wrt the posted issue(s)).
Android Forums is the leader. My "side note" is that those outfits which have the i9500 and the i9505 separated out as two different S4 devices seem to have it best.. it's just so easy to go to your device's area and kick off your thread.
I was analysing the specs again (this isn't just about the Razr and Maxx batteries
). And the prices. There are small but sometimes significant differences in many categories (Samsung I9505 Galaxy S4 vs Samsung I9500 Galaxy S4 - Phone Comparison
I know it's late in the discussion, but I am really convinced users of those two phones need their own forums here; general areas as well as root.