The H67 has RAID support, if your interested in that.
If your talking about overall performance they would be similar.
So the question of USB 3? Some people need it some don't. So do you find yourself waiting for USB 2 often? Extensive external HDD use, HD Camcording, IDK what else...
If you don't have a problem and don't see yourself having a problem then don't worry. I think if you have to ask then you don't need it.
Also on these older USB 3 implementations the speeds can be disappointing. I am unsure about this board but many are quite lame with performance, which kind of defeats the purpose. If you look the board up you may find some info on the performance of the USB3.
Hope this helps.
Disregard the USB 3 performance thing considering your talking about the new H67, the 1155 ones. I hate the naming.