Cooper Discoverer tires question

I've seen several people on this forum sporting the Cooper Discoverer on their 17" trd pro wheels. So I was looking into those and found out that there are different kind of cooper discoverer. I was wondering if anybody can tell me which one they have and what's the difference? Pictures would be well appreciated too.

Thanks!

 

I don't have pro wheels but do have 255/80/17 cooper maxxx skinny tires .. It's a hybrid tire mud/at tire. So far so good for me. Haven't seen much mud since I live in SO Cal and it don't rains here. On the trails have held up very well

 

I've got the SST Pro's. They are mud tires, loud and obnoxious, but tough and grabby on rocks and in silt.

Click on this link and you will get a brief description of all of them.
http://us.coopertire.com/Tires/Light-Truck.aspx

 

The following Discoverer models are pretty common:

Discoverer AT3
Discoverer STT Pro
Discoverer ST Maxx
Discoverer ATP
Discoverer MTP

The last two models are Discount Tire exclusive.