The 6dti, 6x6.8, 6woa all run neck to neck in speeds and any of them are perfect for coyote, deer, antelope.
You really can't go wrong with any of those.
I have built 2 6x6.8s on the AR15 frame, sold them and now have 2 6x6.8s on Savage actions. That cartridge is more than perfect for p-dogs to deer!