This is, of course, debatable, but the common agreement seems to be that coyotes can barely see the red light, while green might tip them off easier to your presence. The red light will also pierce easier through high humidity air and won’t get drowned by the ambient white in nights with full moon.
There are hunters who swear by the green light when targeting coyote, and their preference has to do with the overall clearer picture this offers, as red tends to be absorbed by vegetation, making it difficult to navigate by.