Not much of a difference there...
If you don't think there is a HUGE difference between a RINO like Snowe and Collins versus Hitlery and Shoomie, you've never lived in a state like NY. You've never looked at the difference in the record/ ratings that various "scorecard" organizations have put out. You must have lived your whole life in TX or NB, etc.
If we could somehow manage to replace about 8 Blue State Demodogs with RINOs who might vote somewhat conservative even a third of the time, the whole country would be far better off, and far better, more conservative, legislation would be passed.