Thought I'd report back.
I've been running the segmented tires/wheels on my brush hog for a few months now. I'm satisfied with them. They're tough, and have no visible signs of wear/tire. One note, though, is that they are so heavy that they do effect the "balance" of the mower when it is raised with the lift arms. They'll tip the front of the mower deck down, similar to how the balance of the finish mower is...
I also later ordered a pair of their finish mower style for my finish mower also. Again, satisfied with the quality. Now, the only original sawtooth tires are on my snow/dirt blade which gets little use, thank goodness...