6ft3 here. StaRTed out with conventional and now expiermenting doing sumo-stance. I say do both . Sure youll have a favorite but different stances, grips works different muscles which can assist in other lifts or just make a different appearance.
Sumo-stance is good for bringing up your squat. I beleive I got this info from Cory, the 17 year old kid that Deadlifted 500 plus pounds.