With respect to the TT direct drive motor, I heard that it is designed for military submarine application where smooth and quiet running motors are an absolute necessity.Heh... sounds like Harry hired Tom Clancy to write some ad copy.
The last company that sold the Navy's submarine-quieting technology publically was Toshiba. It cost the CEO and several other execs their jobs and the company forfeited a gazillion dollars in fines and lost sales. The company I worked for cancelled nearly a million dollars in Toshiba contracts, and we were a minor customer.
I doubt any company supplying the Navy would repeat that infamous goof to sell a handful of motors to a few vinyl nuts. Still, it's a great sales pitch!