Interesting. If a trailer has two or more axles, then some of the tires must scuff across the pavement during a turn. A single-axle trailer does not scuff, of course, so this part of the reason is not valid for TMs (except the 3326).
So we are back to "passenger car tires are designed to give a soft ride, trailer tires are designed to give a soft ride, and truck tires have a stiffer sidewall."
Less difference than I thought. Or maybe we should be thinking about passenger car tires on the TM.
Bill