In ATs, I think Cooper AT3 is better than Toyo AT2. The Cooper AT3 is the tits.
In MTs, I think Toyo MT is better than Cooper STT, but there are other MTs better than both of them.
Although Cooper STT and Toyo MT treads look the same, they have very different tread compounds.
Cooper STT has hard tread rubber that will last longer, but have less traction on wet pavement, wet rocks, packed snow, and ice.
Toyo MT has soft tread rubber that doesn't last as long, but has more traction on wet and frozen surfaces.
Warning: I'm notorious for making a post, then editing same post several times, adding info each time, or correcting typos.