At the the time the SCOTUS ruled Roe v Wade the law of the land, Mitt Romney favored abortion rights and said so. Romney continued being pro-abortion until 2004-2005 timeframe. When he decided to become pro-life for purposes of political expediency. Romney is not a principled conservative on the abortion issue. So voting for Romney remains a big question mark in my mind.
Ronald Reagan did no such thing. Reagan never supported abortion on demand and never changed his position. He remained a strong pro-lifer, with exceptions for rape, incest and to save the health/life of the mother. Reagan did regret signing the liberal 1967 California abortion rights act, which specifically centered around the three exceptions. Reagan was concerned that doctors would find a way to get around the law, and they did. And they still are. Most pro-lifers today support the three exceptions as legitimate in the overall context of abortion ethics. Reagan's decision was based on his principled conservatism. Not on political expedency.
How the hell do you know that Mitt Romney became pro life for political expediency? Oh, that's right, you don't.
I could say the exact same thing about Ronald Reagan. You couldn't be more transparent if you tried.