And the difference is? In both cases one party prevented an up or down vote on the other party's nominees.
It may be substantively different. It may be that, since the Republicans controlled the Senate, there wouldn't have been enough votes on the floor, anyway. If my memory serves me, Clinton nominated some real nut jobs who happened to be minorities, then were saying that everyone opposing them was a racist. It may be that the Republicans on the committee were preventing those on the floor from having to cast their vote against.
It also may have been that a lot of Republicans were still respecting the time-honored tradition that the President was entitled to name judges whose political leanings were the same as his own, and that political or judicial philosophy was not a legitimate basis for voting down a nominee. Maybe the Republican leadership was afraid they would get the votes. I don't know.
Frist needs to read every quote on the floor of the Senate and expose these hypocrites for everyone to see.