And you can't compare records that simply. Christie is shaking things up in Jersey, sure, but did Romney really need to do that in MA? As governor, Romney faced a 2000s Massachusetts which had vastly problems than a 2010s New Jersey.
Romney didn't shake things up in Massachusetts because he couldn't -- Democrats had veto-proof majorities of both houses during his tenure, and thus, the ability to legislate without him. And they did. Romneycare, as it's so lovingly put, was Romney working out the best deal he could with the hand he was dealt -- Democrats in the legislature wanted so much more, but they couldn't get the 66 2/3 to agree.