Have been testing the new Claymore 9.7 on a 6 x 1070 rig. It is absolutely faster than before, but have had hangups on a regular basis. Lowering MC helps, but the avg speed will be a bit lower than Genoil (running latest from github). You have to calculate it a bit, since the dual mining (DCRI 20) will give some additional value, but you'll lose 2% because of dev fee.  
The main advantage of Claymore is that it will restart itself, for Genoil you need to use a restart script.
To me it seems Genoil is the better choice for now.