Jackson's ceiling is nice but he, just like Vitters, has major question marks. And Vitters definitely has a higher ceiling than Jackson. All while Jackson is older and hasn't even taken a stab at high-A. Jackson has had fewer question marks show up thus far though. Vitters has serious concerns about walks, defense, and health, while Jackson's only problem thus far has been K's(and he's still been raking despite them). Vitters has the higher ceiling and is several years younger, but Jackson hasn't had any performance issues thus far. I can see the argument either way.