Claymore and Phoenix are know to "inflate" their hashrate. Also with Claymore you will not be able to mine very soon ETH, and now you are not able to mine ETC for example.

At the end you should try to see Shares at the pool... you are payed for Shares at the pool always. With Phoenix is true that you will see a higher hashrate at the client, but this is not the real hashrate. You should check the shares you send to the pool. When you make this test, you will see that the shares are lower with PhoenixMiner. Why?.

1- Highrate is nearly 3 inflated with Phoenixminer
2- DevFee, with Phoeneix you are loosing lot more time in the DevFee, because he generated another time the DAG. In a 1070 that is nearly 10s, each time he makes the Fee + Fee + Regenerate new DAG to continue mining.

At the end this is a high time less mining. So Shares at the pool are lower at the end with Claymore or PhoenixMiner