No, it was money and commitment. Trump never wanted to be President, he just wanted attention. Romney, on the other hand, has been dedicated to being President for at least 6 years now (and probably longer).
If nothing else, the fact that there was virtually no infighting in the GOPe over this, bespeaks a level of organization that ought to move Tea Parties to jealousy.
That's because the GOP-e knows that Romney is a true-blue RINO without question. If he was what the Mittbots try to convince us he really is, the GOP-e would have never supported him. The GOP-e know that Romney is the anti-Tea Party candidate and that no Tea Party pressure is going to persuade him. Romney is their chosen tool to quiet the Tea Party Rebellion just like George Romney would have quashed the Goldwater and Reagan Revolutions if he had been able. Opposing conservatives has been a Romney family tradition for two generations now.
If the Tea Party tries to influence Romney, he'll just form a coalition with the RINOs and Democrats and govern from the left just like he wants. He'll be able to count on the Republican sheep who will continue to vote for him because he has an R behind his name. The press will idolize him (until the 2016 campaign when it will shift loyalty to the Democrat nominee) because he stands up to the Radical Right.
The GOPe must believe Mitt quite pliant in spite of his many famous flip flops. If it were I in GOPe shoes, I would be worried about those flip flops especially if they bespoke something I could NOT control, namely the LDS high hierarchy.
...the presidential campaign of Mormon Church founder Joseph Smith in 1844: “Challenging Democrat James Polk and Whig Henry Clay, Smith prophesied that if the U.S. Congress did not accede to his demands that ‘they shall be broken up as a government and God shall damn them.’
Smith viewed capturing the presidency as part of the mission of the church.