Oh wow guys why don't we just whip 'em out and compare sizes?
I bought the RX-8 because I liked it. I like the styling, I love the engine, and it IS very different to a piston engine, so comparing the two is a little irrelevant. Yes you have to rev the engine to get performance, such is the nature of a rotary. And yes it has a lower peak torque than the Z, but compare the curves.
I drove the Z, I did not like it, noisy cabin, that bulge on the inside of the door pressed up against my shoulder, and in my country it's way overpriced.
If you like the Z great! If you like the RX-8 great! To each his own. The Z's have become so common though that they don't really turn heads anymore, while the 8 is still fairly rare around here. Both are great cars, and I don't really care who can smoke who doing what, though I still maintain the RX-8 handles better overall, while the Z is faster in a straight line, but they require different driving styles. All I know is that I've "smoked" my share of Z's in my 8, but I don't get out at the next light and tell the guy his car sucks
And the RX-8 has won quite a few awards, and the engine won best engine of 2003/4.