Also not trying to stir things up, just reporting what I've seen and MHO.
In S.W. Arkansas we have the "true" coyotes, 25 - 40 lbs, narrow face, small boned, etc. But sometimes we do see what I think of as Dun's Coy-dogs for want of a better word. Don't know it it's coyotes crossed with dogs or maybe a wolf crossed with dogs but they're much larger ( 60 - 70 lbs ) & more agressive than a "true" coyote. While their color is much like a coyote their muzzle is broader, head more massive, etc. Lots of folks around to home call them wolves, I don't know, but they're pretty dog gone big.
;-)