How about zooming in? From the specs on Andy's site:
Z: 2.7mm ~12mm motorized lens, 97°~34°
ZE: 2.7mm ~13.5mm motorized lens, 101°~31°
According to the FOV angles the ZE should get both wider and narrower than the Z. From the pics on the first page it's hard to tell (the zoomed in photos look the same width, but there's no mention of a controlled zoom in comparison). looney2ns, can you verify they both zoom in the same, or post images directly comparing FOV of the Z vs ZE while fully zoomed in?
My $.02 on the aesthetics of Z vs ZE... I think which is best (hidden vs obvious) depends on the actual crime taking place. If it's a quick 'break the car window, grab some stuff, and run', a mask is all they need for an easy clean get away. You have more of a chance of ID'ing the criminal if he/she doesn't see any cameras (mask are inconvenient/uncomfortable). OTOH if it's a complex heist that will take some time, the criminal might worry more about get away time (in this case a mask is the easy part). In this case obvious cameras would be more likely to drive them off to rob a less secured property. So I believe it comes down to a trade between deterring the pros, and ID'ing the amateurs. In this context, I think a combination of obvious alarm signage and hidden cameras is best.
Thanks,
Kevin