Less felt recoil, less likely to flinch on the report, less flash, less noise, tighter groups, and a few more fps. All of these points are easily verifiable.
I don't think these were the "Advantages" the Op was speaking to in his post (Op please correct me if I'm wrong).
Most people mistakenly believe that a suppressor provides the hunter an "advantage" over
the animals he hunts due to the device muffling the sound of the weapon being fired.
This has not been my experience.
All animals (in my experience) will react to the sound of a suppressed fiream being fired (whether or not I'm using subsonic ammo).
Any advantage the suppressor brings to the hunt will be those identified by Libetarian Geek in his post.
The most significant benefit being reduced muzzle blast reducing wear and tear on my ears,
A secondary benefit for the Coyote hunter is that the reduced muzzle blast will not "spoil" your stand to the point that follow on dogs wont respond.
A tertiary benefit (reference reduced muzzle blast) will be that you will immediately know whether or not you have connected with the animal as the smack of the bullet connecting with the animal will be (at times, depending on the distance from the shooter to the animal) louder than the report of the rifle.
Gratuitous Suppressed Coyote pics:
Remington Model 700 220 Swift W/AACM42K
Mossberg MVP Predator W/AACM42K
24 inch barreled Mossberg MVP W/M42K
Gratuitous pic of "Old Time" Coyote Hunter: