Just ran a 12 hour experiment on the exact same 1060 rigs.

Average shares per hour:

Claymore 11.4: 152
Phoenix 2.6: 174

Extrapolated over the month, Phoenix provides 0.08 more ETH over Claymore.

2.7c crashes every so often for me, and just yesterday my virus program deleted the executable so I've gone back to 2.6.