Turbo hybrid is better than Sx. IMO The tool is just built better. Performance might be close to the same. But the sx12 just feels like 2 pressure washing guns screwed on to a 1.5 wand. The SX12 will dry a bit better. But it is barely noticeable. The 15 inch version of both aren't that great. They are just not very maneuverable.
The turbo hybrids are "throw in back of the truck" tough.
Honestly it is just silly to not have one on the truck. Hard surface wands are great. But magic happens under a spinner.
Personally I believe that any real professional should have at least 4 turbo hybrids on the truck at all times. I'm looking at you
Saiger . No 17 inch turbo hybrid= hack.