>>3578827The Zuiko has shit edge/corner performance compared to the Canon even when both are wide open. At equivalent apertures the Canon blows it the fuck out (pic related). I know you'll scream that dead center the Zuiko is sharper, but the final picture won't be because the Zuiko would have to be twice as sharp in the center for the final image to be just as sharp in the center.
This is an easy win for the Canon especially if it's put on a high MP body like the 30mp 5D IV or 50mp 5DsR.
CA is worse on the Canon lens but CA is also easily mapped out by ACR, Lightroom, etc.