Go to
http://wiki.maemo.org/Mer/Documentation/Screenshots and check out how Mer looks on the SmartDevices Q5 and Q7.
Can you tell which pictures I took using the Q5 versus the Q7?
Mer looks identical on both platforms but I did find one difference in performance.
My Q5 does not remember its WPA2 password after a reboot while my Q7 does.
However, my Q5 has a clock issue and that may be the problem.