Any major difference between the xv6700 and the ppc6700 besides color?

[SoonerDude]

I'm an Alltel customer and am shopping around to buy a 6700, and wondered if there was any major differences between the xv6700 and ppc6700 models. I like the black color better, and am leaning in that direction, just wondiered if there was anything else I should take into consideration when deciding which one to go with.