As brought to you by Kyata and Goro.

Noticeable differences between Kyata and Goro

Kyata (Foxes)
Slimmer bodies
Slimmer and longer muzzle
Spikier tuft of fur marking the end of head

Goro (Wolves)
Bulkier bodies
Shorter and fatter muzzle
More broad tuft of fur marking end of head

You can't really see the body structure in that pic but...

You can clearly see the difference.