I had the time (and nerves) to create some photos. As I am not a professional photographer complains can go to
you_suck@nsa.org. ;-)
Anyways, here is the comparison between my JetBook Color 2 and Onyx M92. The first three are the JetBook Color 2 (without extra external light, with extra light, fonts) and the last two are from the Oynx M92.
The JetBook Color 2 has no interal side lights (the M92 hasn't one either - which is a good thing). The software is as far as I can see the same.
The decision is simple: If you want a big good all round e-book reader with good usability get the Onyx M92. If you like color (comics, pictures, color e-books) and are a little bit masochistic in relation to usability get a JetBook Color 2.
Personally I'm mostly using the M92. The glare screen on the JetBook Color 2 has the same 'glaring' like on an iPad but I also have to say: Reading color media on a JetBook Color 2 is quite impressive (more impressive than the pictures are maybe indicating).