Keltner plays Paiste cymbals, Tutt A. Zildjians; the two brands sound very different. I played A. Zildjians in my younger years, switching to Paiste 602's in the mid-70's. Keltner is a master at drum tuning, his drums usually sounding great (though live I found his DW's to be too "ringy", LOTS of sustain). Tutt I never heard live, and his drumming with Elvis not to my taste (he's fine in the Roy Orbison tribute show).
Keltner has done far more recording than Tutt, and is a true musical artist, not "just" a drummer. Ry Cooder arranges his recordings around Keltner's availability. And then there was Leon Russell, who didn't care for his drumming. He asked Elton John to dismiss him from the recording sessions for their album together.