Yeah, Its all clocked higher because the 650 GPU is lower end. As the processing power of a GPU goes up, the Clock speeds come down a bit because of heat restrictions lol.
And yes, I run through all those same issues with my "I think I know everything about Tech but DONT" friend too lol
Kinda how you'll see a (For example) a Dual Core Phone at 1.5Ghz but a Quad Core at 1.3Ghz. Quad is better, but if he sees It hes like "No cause the dual core is clocked higher" =/