Ramirez has more upside than Cooper, mainly due to raw power potential. Ramirez obviously has, however, been unable to tap into all of that power, or even keep up an acceptable batting average for long periods of time. The culprit for this is likely his swing mechanics. His batting stance incorporates a left arm bar that makes it difficult for him to adjust his bat through the zone, and he doesn't have enough bat speed to make up for the stiffness in the swing. I thought the Brewers would have worked to fix this years ago, but watching him briefly in spring training this year, it appears to still be there. If it doesn't get fixed, I have a difficult time seeing how Ramirez would even come close to hitting for a combination of enough average and power to stick in Milwaukee. So in that sense, Cooper might be the safer prospect of the two because he has a smoother swing (albeit without the power potential), and thusly a higher floor.