3611 / 1333 = 2.71 MIPS for each MegaHertz
1783 / 1333 = 1.34 MFLOPS for each MegaHertz
If you have a calculator you can figure the score for both the Duron and Athlon T-Bird at any given speed, since it just tests the core. It does not test memory speed, including cache memory.
My Athlon T-Bird at 2.5GHz scores:
6775 MIPS
3350 MFLOPS
Get the picture?