That said, Canon has historically been the winner with their lens selection, and IMO UX. Sony is quickly catching up, or even surpassing them though with e-mount, especially now that more 3rd party lens manufacturers are killing it (Sigma). I also like EVFs more than OVFs since you get a better exposure preview and focus peeking for manual focus. I really, really, really wanted to buy a Sony a7, but I ended up buying a Canon 6d due to lens selection a few years ago (and the Canon beat them on price). I'm a huge fan of mirrorless tech and I'm actually surprised that SLRs are still around.
The camera body is being commoditized. I'm a canon fan and hope they catch up with a full frame mirrorless, my buddy who follows the tech more said he's heard rumors that they are releasing one next year?