At best Romney is apolitical or bipolitical. I definitely don't agree that he thinks like Paul Ryan. Ryan clearly bases all his thoughts on core principles and values, while Romney is much more of an "ends justify the means" type. Romney is not someone who can be believed or trusted. But he apparently can be swayed by pressure. So as long as the conservative side puts more pressure on than the liberal side in years to come, he could do an okay job just governing by polling numbers like Clinton did from 94-98.
I definitely believe that Obama does not think like Paul Ryan.
I read that Reagan didn't become a registered Republican until he was 51, and that he was a long-time admirer of FDR. Politicians sometimes change their views. Time will tell whether Romney is sincere or not.
I'm willing to look at where Romney's ended up, rather than where he started, with the hope that his metamorphosis is real. But as you say, with sufficient conservative pressure, the point is moot.
In reference to the similarity with Paul Ryan, what I meant was that they are both intelligent, logical and analytical, particularly in regard to fiscal matters, which would be a massive improvement over the current economic idiocy emanating from the White House at present.