Having had a Z3 and Z4 e85 at the same time, so able to have a good comparison, The Z4 always felt BIG. jumping back into the Z3 I always felt I was in a sports car, the Z4 just felt more of a GT, a bit too big and a bit too heavy. The same for the e89 Z4, nice as it is it's a GT not a sports car, again by comparison, I get in the Z3 which I don't drive as often as I once did and as soon as I'm off I just want to keep driving for the pure pleasure of the car, Z4? usually just drive to get where we are going.
To sum up, we did Scotland again this year, been quite a few times before, always in the Z3, took the Z4 this time......REALLY missed the Z3 on the west coast roads.