Optiminer should be faster. Do not forget that you have to subtract 2.5% for the dev fee on Claymore while optiminer shows hash rates with dev fee subtracted already!
That's true, but Claymore has fan control! /sarcasm
Your miner shouldn't control the fan anyway. That should be controlled as a separate process. Give me a few days and I'll try and re-write my fan controller so it's a little more robust. I wrote one that you set a target temp for each card and it will bring the speed up or down to meet that.