Have you tried not connecting the clock cable to SOTM switch and hear the same improvements? The clock input in SOTM IS 10Mhz. I don’t think MSB clock can generate 10 MHz. They are incompatible. One should be using Mutec Ref 10 or CH Precision T1. What you hear the improvement is simply the cleaning of signals by SOTM switch.
I did use just the switch for a while, because I had no BNC cable. Slight improvement, fuller bass, nothing dramatic.
Plug the BNC in, and voilà. Magic. You're welcome to come to the store and I'll show you how incompatible they are.