Whats the difference between the Samsung tocco f480 and the samsung behold (tmobile)?

I just purchased the samsung f480, because i wanted the new behold, but this was cheaper. I haven’t received it yet, I need to know the differences, like if it will work in the u.s. and with t-mobile, and if it is worth keeping over buying the behold, oh and if its 3G. If not i will reauction it on ebay.

What is the difference between the samsung f480 and the samsung behold?

I would like to get a touch screen samsung phone but can’t quite decide which one to get. any advice?