But the problem is that that is not a real world test, it's an artificial benchmark, which isn't a very good measure of anything, hence the large number of anomalous and down right wonky results on it. If you're buying a graphics card with gaming being your intent, it's a lot more useful to compare and contrast real world performance in games you want to play. The link I posted above looked at 7 games, and of those 7, the 650 ti Boost was faster, or as fast as the 750ti, in all 7 of them.
My advice to you is to look up some benchmarks of games you plan to play, and compare the results of the two cards for them; that will give you a far better picture of real world performance that any artificial benchmark.