3DMark06
3DMark06 combines the results from its graphics and CPU tests in order to reach an overall score. Here's how the processors did overall and in each of those tests.

The E6750 actually drops behind the E6700 by a handful of points in 3DMark's overall score. That's due to it giving up a few hundredths of a second to the E6700 in 3DMark's graphics tests, which are largely GPU-bound, as one would expect. The differences here are inconsequential. The E6750 does make up some ground in 3DMark's CPU tests, but not enough to put it ahead of the E6700.