I'm one who does think highly of Syntec and SB. They both run very quietly. I've never done a UOA on either, but if the old GTX drive hard did well in my trail Jeep, I imagine that the SB 10W40 was stellar.
In my experience Syntec runs quieter than Mobil 1. Then again, so does Q-TP, Q-HP, PP, etc... Does that mean more wear? I doubt it. It does add piece of mind though.