Cabelas signature semi syntheic oil vs Quicksilver oil
ONLY used Yamalube semi synthetic or Evinrude semi synthetic.
Also ran some Yamaha ring free through every now and again.
Especially with the high pressure two strokes (VMAX HPDI, Opti, ETEC) I think the semisynthetics are worth it for cleaner burn and less deposits.
Boat mechanics have also told me "No Wally World 2 stroke oil, TCW3 or not" and if anything, they have financial interest in your motor breaking down.
YMMV but given that stuff is being burned as you go, I always used good oil.