Are you suggesting they will be bigger with Claymore or Ethminer?
Hashrate basic test for me, the test show your OC and GPU performance but as i said, you are earning with your shares. Most of pools mode is PPLNS. Also you can try change the miner paremeters for best performance. Claymore has different kernels than Ethminer for AMD cards but NVIDIA cards not many option. I have own ETHASH kernel but I'm so sorry NVIDIA doesn't support it.