Comparing performance between Quadro and Geforce


I did some performance tests to compare the performance between Quadro m6000 and the Geforce GTX980. One of the tests, I commanded the GPU to draw a lot of pixels (many simple quads that fills up the screen) and the GTX980 outperformed m6000 by ~200%. I am wondering why there is this big difference. The test program is OPenGL based and the only difference in setup is the graphics card and driver. My system:

Intel i7, 24 GB ram, Fedora Linux,
Geforce GTX 980 driver 343.22
Quadro m6000 driver 352.63

Since the difference is big, I am wondering if I set this up correctly. Have anyone done this kind of tests and see the similar results?