Oh, the 1600+ is 10.5 x 133 too of course.
As you can see, there isn't much difference between the two cpus, and I don't feel any performance difference between 'em. The only program that runs faster is PhotoShop, and that's probably because of SSE, but the 1Gb ddr-ram (versus 768mb pc133 sdram) is influencing this so I cannnot really say if how much better the cpu performs.