No, There is not enough difference between Romney and Obama.
If we are going to have a President that is pro socialist medicine, pro special gay rights, pro changing the definition of marriage to include sodomy, pro abortion, anti-gun and big government, then let that President be a Democrat, not a democrat masquerading as a Republican.
Romney is not pro any of the liberal things you listed. That is the little fantasy that keeps circulating here. Romney was more liberal in Mass. If you don’t want to forgive him, fine, but his positions now and in ‘08 are arguably the most straight conservative in the field. Romney ran as a conservative alternative to McCain even in ‘08.