Unfortunately, I am unable to purchase each of these systems individually and make a rational decision in that way. I am simply presented with the information on the internet and asked to determine the winner as all of you are. With that in mind I have become something of an expert at determining winners in this fashion.
I have compiled a chart of the relevant reasons to purchase each one of the above systems. As you may note I have excluded Nikon’s F mount for the simple fact that I know the least about it.
On the other hand, I have included Canon’s EF mount because it is by far the dominant mount even with the ongoing switch to mirrorless. There really isn’t anything wrong with EF mount from a technology standpoint.
I personally think that the industry is probably headed towards a mirrorless future, so I’ve decided to focus mostly on mirrorless. And because of the wide adoption of EF mount that Canon achieved I’m including EF lenses and cameras in this comparison chart.