150 grams protein a day (plus 10mg dbol)
vs
300 grams protein a day
= WHO WINS
It depends on the weight of the person in question but i can say both amounts of protein are excessive for the average person who lifts weights. The natural strength/bodybuilding athlete needs 1 gram of protein per 3-4lbs. For a 250lb man this would translate to 83-63 (rounded up) grams of protein. So, technically the answer to your question is both people would make the same gains, although the one consuming 150 grams per day would store less fat due to less macronutrients consumed that cannot be utilized. Lets take a quick insight, though, into the type of person that would need these protein intake values. Lets say that the 250lb man that we used as an example before uses testosterone, trenbolone and nandralone. These anabolics greatly increase protein synthesis and nitrogen reuptake, translating to greater amounts of protein being able to rebuild muscle fiber tears. This 250lb man would need to adjust his protein intake to 1 gram per 2lbs of bodyweight, or 125 grams of protein. If this 250lb man was using testosterone, nandralone, trenbolone as well as human growth hormone and IGF-1, he would need even more protein to fuel the supraphysiological protein synthesis levels increased by the synergistic effect of hGH and IGF-1. He would need to consume 1 gram of protein per .75lbs of bodyweight, or 188 (rounded up). Finally if this 250lb man was using testosterone, nandralone, trenbolone, hGH, IGF-1 and insulin then he would need to consume 1 gram of protein per 1lb of bodyweight, or 250lbs, since insulin causes increased macronutrient shuttling and usage instead of storage. To sum everything up, it is important not to simply give set protein intake values and assume one is better or worse. Protein intake, as well as overall macronutrient and caloric needs are variables dependent on one's weight, activity level, level of experience training and supplementation.