it's not really the difference if the image quality, but the power of the r9700 to produce faster framerates of equal image quality. so in a sense, it looks better in motion. i doubt you'd be able to tell a difference from a screenie.
Athlon XP 1.58GHz | MSI KT3 Ultra2 | 256MB DDR PC-3000 | GeForce 4 ti4200 64mb @ 310/533 | IBM 120GXP 40.0GB | Det. 41.09 | DX 9 RC2 | Win XP SP1