If you look close at the Kuhmo´s (Fulda), the Big O´s, the Wal Mart Mud tires (forget the name). The tread, on at least two out of three are clones, with different side lettering. I look for sales and extended warranty promotions.
TSL´s seemed to work the best off road in most situations, But are noisy and wear fast.
Dunlop M/T´s get the job done, come in most sizes and can be had cheap, often. They last well.