I have both the Mobius and the G1Wc. My preference is the Mobius because it is far better built and more reliable. I had problems with the G1Wc along with several other people; it seems to be related to build quality. The one I have now (3rd one, 2 were returned) does quite well. The reliability of the Mobius, the ease of component swaps, and it's tiny form factor are what I like most about it. A great bargain if you ask me, and perhaps the best dashcam in the $100 price range. The G1W cams are the cheapest I'd go for; the rest in that price range are not very good at all. The Mini 0806 seems to be suffering a lot of 'teething problems' ATM, which may get worked out but until then I'd avoid it. Look at the Mini 0805 instead. You might also want to consider the A118C, another generic cam but lots of people like theirs. All of these have very different form factors which may make a big difference to you.
Read the various forums about the cams you are considering. Look for threads relating to problems and see if they were worked out and how. The more you know, the better your chances are at getting a cam you'll like on the first try.
Phil