The Zero-G-Roll on Kraken is one of the best.
Speed coasters don't have loops or zero-g-rolls, so the floorless design will continue. Speed coasters have those huge banked turns, but I like the zero-g-roll and loops better.
But to answer the question, the ride of a floorless vs. inverted is different. The inverted hangs, whereas the floorless has the track under it. You can feel the differance in the ride elements. The inverted sort of whips you thru the loops and rolls.
I like the inverted the best. The track is above, and you can see everything. Whereas, on the floorless, you still see the track. There is something between you and the ground. I like to hang.
I wish they would build more inverted coasters like DD, Raptor, Alphie. With more negative G hills like on DD (Fire), a final helix like Raptor, and the big drop of Alphie. I want a super inverted.