* canon rangefinder style bodies completely lack viewfinders
* canon makes tilty-flippy screens if you're into vlogging with a mic
* fuji bodies have the most direct control dials and are retro styled
* sony has infamously bad menu system, fuji considered to be very good. canon menus are simlar to their dslrs', which are probably pretty good(idk)
* sony considered to have least confident weathersealing, canon has no weathersealing
* sony considered to have best sensor tech, best dynamic range. most sensors are made by sony
* canon is famous for colors, though fuji perhaps has better jpgs (they are famous for film sims). sony colors are considered "flat".
* fuji xtrans sensors often derided for having a "wormy" appearance on tiny details, and poor raw support (I don't' think so)
* sony famous for fast autofocus/sports shooting (sony a6000 still very competitive).
* canon doesn't have many lenses, but the 22mm is good. They have a cool programmable dial on the front, and support AF for their dslr lenses (with adapter)
* fuji don't publish the mount spec, so it is unlikely that you can get 3rd party AF lenses. They have a "compact prime" lens set that is popular (23mm, 35mm, 50mm f/2)
* sony native lenses are most expensive, but they have the most 3rd party (sigma, samyang, etc). shares the mount with their full frame cameras, to encourage upgrading. Some consider this a fault if you want to stick with apsc for good, because full frame glass is expensive and big, and handles poorly on apsc bodies.
* canon is the best-selling brand, although popular belief is that canon is least invested in the system, because they are developing their full frame lens arsenal. (also they are said to gimp their entry level bodies to encourage sales of pro bodies.)
* fuji are considered most "invested" in apsc system, as they don't have a full frame to split RnD time.
* sony hasn't released a new apsc lens in a while, but claim they will soon