I have a Sony a6000 and it is very tempting to upgrade or supplement it with a Sony full frame mirror less. However, when looking at the Sony mirror less and the Canon and Nikon DSLRs the isn't a huge difference in size to my eyes. I have not looked closely, so forgive me if I am off here.
With this in mind, are there significant advances to a full frame mirror less camera over a Canon or Nikon DLSR?
Thank you in advance for any input.