If you can compare it to a 1jz soarer or a 2jz aristo or maybe a 5 speed GTO or maybe a R32 GTR.
Also, are the gears on a 6 speed rz short ? In a 5 speed gto I'm used to doing 100km/h in third gear at about 3.2-3.3 rpm.
Is there a huge difference in terms of acceleration in a 6 speed vs an auto RZ?