The biggest difference is that the GOPe pushes RINOs with all their might—and their might is considerable, thanks to D.C. constantly grabbing more $ and power. With Trump, it is the electorate forcing Trump on the GOPe, while they panic and desperately seek ways to defeat him.
Whatever else he is or isn’t, Trump is anathema to the GOPe. The heartburn and consternation he is causing amongst the likes of Boehner and McConnell is monumental—and this is only the beginning.
IF he destroys the party it might be worth 8 years of his rule. Big if. On both counts.