The coopers are a bit noisier than the Toyos. Not sure if you care, but just saying.
My brother has the Cooper SST on his and it's loud as any other mud tire. I went with the Kelly Safari TSR and I think he's decided to go that route next time. They're quiet, agressive, great on-road and great off-road and I'd recommend them any day, but if you want a TRUE mud tire, go with the Toyo