Which would you choose?

Samsung: http://www.metropcs.com/shop/PhoneDetails.aspx?ProductId=SCHI220ZSAM%28Phones%2 9

Blackberry: http://www.metropcs.com/shop/PhoneDetails.aspx?ProductId=PRD26497019%28Phones%2 9

The plan for the Samsung is $50/mth and the Blackberry is $60/mth.

Is there a huge difference in these phones? I don't know much about the Samsung phone, it says something about Windows? We use Mac computers and don't have anything with Windows running, not sure if that matters?

What would you choose? Trying to get a new phone for my husband for Christmas and can't decide.