Boils down to same party controlling Senate as the Prez  VS  different parties between the two.  There have been plenty of historic precedents, following each of those patterns.  Delay in the Garland example of similar historic cases vs  moving forward in the Ginsburg circumstances of historic cases. 

Here's a detailed source, discussion many of such cases, from Thomas Jefferson to Obama with Garland, for anyone who wants to get down into the weeds. 

Click Here   

Its conclusion:  "There was, in that sense, nothing unusual about the Republican Senate’s refusal to vote on Garland’s nomination; just as there is nothing unusual about a Senate immediately voting on and confirming a President’s Supreme Court nominee when both the President and the Senate majority belong to the same party. . .This is the accepted norm in American politics and has been almost since the dawn of America itself."