They both hear quite well. Coyote way better than a Red, IMO.
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This am, spotted a balled-up coyote. Coyote was on the North side, 1/2 down on a big picked bean hill, sleeping. Wind rippin out of the SSE 20-25.
I slowly & quitely stalked & then crawled quartering in from the coyote's SW. I slowly crested a hill roughly 400yrds away. Coyote was still laying, but staring a hole in the top of my head. As I took a peek, on his status.
When their [fox & coyote] laying in a dead air space, out of a howling wind. I don't believe they miss much of any noise that pass's bye. Especially a coyote.