I'll put it this way. I have a modified Evo X which I quite like the driving dynamics and "feel" of, but I like the feel of the 370Z better. I like how it rotates, I like how it is more nimble; it's just a better driver's car.
It's pretty much common opinion out there that the Evo X handles and feels superior to the 08+ STi, so think of my feedback what you will. I suggest picking up the Z. IMO it's two steps above the STi.
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'10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake
'08 Evo X - built motor+trans | BB-X @ 32 psi | CH3OH | self-built+tuned - ??? WHP
'01 Galant V6 - built motor | GT35R | self-built+tuned - 550+ WHP (retired) |