The R8 to the zed is really an unfair comparison tbh. It's supercar performance and handling. Complete different animal.
The R8 is quattro so straight line driving, she just pulls. Then the handling of the R8 is just scary, it literally just flys around corners. I was always weary on corners with my zed.
Then you get to the sound of the engine/exhaust. I've put a full system on the R8 with F1 sound. It sounds phenomenal. I found my system on my zed more raspier and not as deep sounding as the V8.
I loved my Zeds though, great cars, hence why I'm looking for a an everyday driver again. I've still got an engine, full system and air box's. Lol