I look at it as 4 - multiply by 2 for rooted. While waiting for 64 GB models, I'll be taking an interest in all mods for each.
For a great many, the choice is likely going to come down to screen size vs speaker sound.
Setting aside esoterica, that's the real choice they're giving on two faces of roughly the same area, and that's what stares back at you in every side-by-side photo or in-hand comparison -
Bigger display on one, stereo speakers on the other.