Gigabyte is known for making nice motherboards, EVGA, not so much. Both look like they offer roughly the same spacing for slots. I think what's throwing you off is the 2nd slot on the gigabyte, which you would ignore because most cards nowadays are double slot coolers and so that second pci slot would be covered up and un-usable.
Also, I'm using an EVGA right now and I have USB issues with it. Very troublesome at times and I really don't have any plans to use another EVGA board in the future.