Yeah Dominator's turn after the loop is a lot of fun, plus it has the standout cobra that's much better than Medusa's in pacing and forces. The drop off the MCBR has a pop of air (though not as much as I expected, even back row) and the first drop also has a pop of air if you sit on the right side of the back row. Add that to the steepness of the first drop, the floater air on the first loop, the intensity of the corks (not much better than Medusa's or BDK's-the other 2 floorlesses I've been on- but definately a little different in style, and slightly more effective IMO) then the unusual ending, and you've got a very good ride.
I've been on Medusa probably 80 times, and I know Medusa's very similar to Kraken, minus the first drop. While Medusa is fun, it's not very thrilling. Dominator's not the most thrilling ride ever, but I think it's much more exciting than Medusa, and most likely, Kraken.
Real, I'd include Kumba's roll as being on the different list, mostly because it seems much more intense than the rest. I assume you were just speaking of Sitdown, but Inverts give a pretty different feel, especially something like Raptor which has a 0-g that's likely more similar to Kumba than Medusa or Kraken.