Yes, the GRE has been way ahead of the curve for a long time because it's an adaptive test: it actually adjusts the difficulty of the questions it presents you based on your performance up until that point in the test, as it tries to hone in in exactly what your correct score should be.

I don't know if the algorithm has changed since the early aughts, and I don't know if that approach is better or worse than the one-size-fits-all non-adaptive SAT, but the difference was always striking to me. You'd think that if the GRE adaptive approach was better statistically (by whatever measure) they'd move towards it soon for the SAT as well since they're going full digital finally.