It may be the same hardware, but nVidia is known to block existing hardware features in their drivers on consumer level chips to drive prices. They did this in

It may be the same hardware, but nVidia is known to block existing hardware features in their drivers on consumer level chips to drive prices. They did this in the past with quad buffer stereo (full screen only, not available through OpenGL) or decreased double precision performance (transparently added NOPs after each double precision opcode). I will believe that these devices are equal when someone shows me benchmarks proving that. Until then, I am skeptical based on past experience.