Can't say that I've actually used both of those tires myself, but to my knowledge, the sportsmans will last longer, but will not supply as much traction as the ET streets will provide. So I believe that it's a trade-off between the two, and your decision should be based on what your priority is (better traction, or better mileage). I also believe that the Sportman Pro would be atleast slightly better in the rain (if that will be a factor in your decision). But please don't take my opinion on that comparison as ther final word because my actual experience is more with drag radials such as the ET street radials.