If you could have outfield prospect Jaff Decker of the Padres, or outfield prospect Brett Jackson of the Cubs, who would you pick and why?

Jackson has much better physical tools, of course, and is showing substantial progress with the bat. But Decker is two years younger and was a monster in the Midwest League last year. He's just getting back on the field now after a spring injury, so I felt this was a good time to pose the question.