Hypothetical scenario:
Two twins. Twin A and Twin B.
Twin A did X workout with Y diet, and so did Twin B. When Twin A reached the age of 25, he decided to take steroids. When Twin B reached the age of 25, he decided to stay natural. The two of them both did the same workout and the same diet plan.
Now, in this scenario, let's say that they both have a 300 pound bench press and their goal is to bench press more. After about 2 years of steroid usage with consistent training and dieting (same training programs and same diet), how much more will Twin A, the steroid-user, will gain?