Patterson is going to get leg hits, while Hamilton has more of a Larry Walker type of stroke. They have the bat speed and the swing. They'll hit for average, but not like Sean Burroughs. Robert Gurganus Hamilton has more home run potential than any prospect in the game. It hasn't fully manifested itself yet, which isn't abnormal.
Power is often the last tool to develop.
Opinion was more divided on Patterson. At worst, he'll have average big league power, while some people believe he can hit 30 homers a year. He has consecutive 20-homer seasons despite being young for his leagues, and he hit two homers after the Cubs promoted him last September. And once you get to 40, you're looking at 60 in this day and age. He's definitely an 80 power guy.