Use your natural build for a deadlift advantage. Lifters with longer legs and shorter torsos will usually be able to lift more weight in a sumo stance – this is why women are typically better sumo deadlifters than conventional deadlifters. If you have a long torso and shorter legs, stick to conventional deadlifts. If you’re only concerned with building muscle rather than picking a stance for a 1RM, use both types in your training for optimal development.
Reference: Hales, M. (2010). Improving the deadlift: Understanding biomechanical constraints and physiological adaptations to resistance exercise. Strength & Conditioning Journal, 32(4), 44-51