I have TB Pneumatics and Trampa superstars with MBS rubber. These a a touch harder, but not harsh like a urethane wheel. Good range. I’ve long worn the tread right off, still rides great. Killed the original bearings, now on the second set, still rides great. I’ll ride them until I start feeling the rim 
I like them as good or better than the TB rubber, as far as feel goes, though the TB wheel is softer even at max press. These wheels are actually quite well balanced off the shelf. I’ve gone as fast as 27mph and they were super smooth, maxing out the 10s Deep Purple 1 of 2. The TB’S are on 12s Deep Purple 2 of 2