Personally, I must admit to finding that these arguments over the naming of things generate more heat than light. In his Demos speech, David Cameron laid out four things that progressive Conservatism stood for: moving people permanently out of poverty, a society with equality of opportunity, a greener, sustainable planet and a safer society. These goals, though, can be achieved in very different ways; that is where the rubber hits the road. For instance, one could easily identify policy differences on how to achieve these goals between the six progressive Conservatives that Tim identifies.
One of the defining features of the top tier of the Tory party now is that there is no defining ideological split. There are, however, a string of divides on individual issues from localism to foreign policy. I suspect that it is on an issue by issue basis that we will see tensions and alliances form when/if the Tories are in government.