Depends in your play style. Personally I don't use wami do to his loadout/lack of utility. Smoke is a solid op and one of my main ops, his shotgun allows for rotates and his smg-11 is a solid smg, pretty basic recoil but has little ammo. Smoke is also a strong vertical op smokes allowing for good utility to block plants/help for retakes.
Smoke stops strong plant spots. Even able to prevent them on other sides of walls and through floors if you learn the character, he can also prevent pushes into sight or an important room to hold. Wamai is dangerous with his gadget grabbing throwables and still allowing them to detonate; killing some unsuspecting enemies... AND teamates if you aren't communicating.
Well non ofem are better than other but both are god in right hands Best Loadout for smoke shotgun and smg11 For wamai in my opinion mp12 and raino
Wamai, smoke is just really bad
Wamai because his utility and gun is what I’d prefer over than smoke
Wamai cause is a jäger that triggers the nades it catches