Conventional because I can pull 605 Sumo im arround 495 I havent mastered the technique and built proper muscles yet to sumo in comp. Im working on it though I think I will be able to pull as much sumo by next year. I know I will last longer if I pull sumo in training.
My body definitely feels less beat up from pulling sumo than it does from conventional. Only thing is it can really aggravate my hips if I'm doing too much hip centered stuff like pulling sumo and doing sumo accessories and squatting low bar all at the same time.
Generally in the off season if I'm pulling sumo I'll squat high bar or front squat and do conventional deadlift accessories. Or if I'm squatting low bar I'll pull conventional or trap bar.
