The deadlift is one of the best exercises for building overall strength. You can perform them with either a hip-to-shoulder-width stance or sumo-style, with your feet out much wider.
It’s also great for building muscle size in your lower body, but where you’re adding that muscle exactly can differ dramatically between the two styles.
In short, the sumo deadlift is a good way to work your quads, while the standard deadlift is a good way to work your quads, while the standard deadlift is better for your glutes and hamstrings.
Incorporate both styles into your training.
This way, you’ll bring up your strength with both squats and deadlifts without compromising your numbers in either move.