AT&T and T-Mobile bring the Android competition with the Samsung Galaxy S-class Captivate and Vibrant

Phil Nickinson, my counterpart over at sibling site Android Central has just posted his AT&T Android Captivate review and T-Mobile Android Vibrant review, the latest, greatest US GSM competition to our own iPhone 4. They're both Galaxy S-class devices, but one of the strengths of Android is the ability for manufacturers like Samsung and carriers like AT&T and T-Mobile (and Verizon and Sprint when their versions launch) to modify and customize the hardware and software to make their devices distinct.

Ally already posted her thoughts on the AT&T Captivate vs. iPhone 4, so if you're trying to decide between the two, or between them and the T-Mobile Vibrant, give Phil's a read to and them come back here and let us know what you think.