Just got my B7, coming from a Meebook M6C
So far the B7 has been mostly better, apart from the screen and backlight.
When the backlight is very low or off, the Meebook seems to have better clarity. I think the better way to describe it is the matte glass on the B7 is "matte-ier", or "frostier", if you get what I mean. It's evening here and I need to see these two under sunlight to see if the increased matte on the B7 creates an advantage in that scenario.
The M6 also gets WAY brighter. That said, I think I've never used the M6C at more than 50% brightness, and 100% on the B7 is around 70% of Meebook so it's more than enough and not really something to be concerned about IMO.
Same story if you add the warm lights. 100% of the warm light on the B7 corresponds to 70% on the Meebook.
Other than these two, performance and features are on the B7's side.
Will be able to make a better comparison in a few weeks of usage.