lift big--eat big
I know you want the magic system, but bottom line, different systems work better for different people.
You could use any cobination of any mass building diet and mass building lifting scheme and achieve different results than your brother. Use maximal weights with lower reps as your base. Periodize in higher reps with lower weights to give your body a little break and different stimuli. But the goal here would be to focus heavy and increase steadily the volume.
Nutrition is as/or more important in combination with the workout. Maximizing parameters and potential of intake could really speed up your goal process.