One nominee was at the end of a presidential term and the other is at the beginning of a term.
So? Was he not potus for four years? He wasn't elected to a 3 year term.
The moral is that republicans will do anything, say anything, and then bitch and whine when the predictable consequences of their conduct occur. What did they really think would happen, the dems would go, "OK, you wouldn't let Obama appoint a supreme court justice during his term, but we'll just forgive and forget and approve your guy"?