You are false, I had the same case before while looking at the Toshiba Qosmio X70 against the Lenovo IdeaPad Y510p...
The Qosmio has a GTX 770M GPU and the IdeaPad has a "Dual" GT 750M.
So let's say the GTX 770M scores a 9/10 and the GT 750M scores a 7/10, still the lenovo has two of them.
Also the GTX 770 is 3GB of Video, but the double GT has 2+2 so 4GB.
Bottom line, the ideapad is amazing.