Good question. I actually think several of the NBA teams would fare better due to better fit and chemistry. For example, I think the Cavs, Warriors, and Spurs all would've ran through the Olympic teams, and I think we'd even have a solid chance at gold, assuming that we get to use our foreigners like Horford and KO. Of course, our physical D would probably not do too well in the soft Olympic game with how the refs have called everything.
Though the overall talent is immense, this Team USA just does not fit well together. It's one of the reasons why many are doubting the Warriors' fit this coming year.
EDIT: I was assuming that Team USA wasn't around in this scenario. Also, on second thought, San Antonio probably wouldn't with as many foreigners as they have.