When I bought my Nikon d70 years ago, I based my decision on the fact we already had 2 35mm Nikon bodies and half a dozen lenses, it was a no brainer for me. Starting fresh, I would honestly flip a coin apples to apples between canon and nikon. Pick the one that is more comfortable in your hand, with your staple lens mounted. Go for an anti vibration lens with a very low aperture and a good range like 18-200 mm zoom. With one nice lens, you will need less secondary lenses and have a much wider range of useability on the fly.