Well spec wise, it should be about 7870M which is like 7850 which is 2-5fps more than GTX750Ti on average, since vsync is in use, it will bring down to GTX750Ti level, check all the benchmarks of PS4 you want, and then do the same with GTX750TI, you will find out that this is the truth, its paper specs were overhyped, usually thats the case with AMD cards, not fanboying, look at R7260X for example, its lesser than GTX750Ti in real time perfomance, but paper spec wise, a lie, I have researched upon this matter and this is my final conclusion:
GTX750Ti=PS4
R7250X(or 10% better)=Xbox One
http://anandtech.com/bench/product/1130
http://www.ign.com/wikis/xbox-one/PS4_vs._Xbox_One_Native_Resolutions_and_Framerates
P.S= Company of Heroes was 0% optimized for Nvidia cards....
multiply the fps by 1.44 to bring to same 900p result if a game is running at 1080p on 750ti...
Conclusion: your machine is better