Vladimir Guerrero - Vlad has been a great hitter for a long time. Everybody knows how good he is as a hitter. I have also heard that he is a good clubhouse presence and is a good influence on younger players. Vlad is a big guy with good power who was the cleanup hitter on last year's American League Champion Rangers. I think he would fit right into the Rays lineup as protection for Evan Longoria. Although he is a free swinger, that is only because he can hit pitches that most hitters can't. He has long arms which give him excellent plate coverage. He drives in runs with not many strikeouts which means even when he doesn't get on he puts the ball in play. He only swings at bad pitches because he is able to hit them.
Manny Ramirez - Manny, like Vlad is also a future Hall of Famer. He is one of the best hitters this game has ever seen. However, over the last couple of years he has been injury prone, high maintenence, and has seen a decline in power. Manny has a reputation for being lazy and a bad influence on younger players. On the Rays whose team is mostly made up of younger players, the Rays need someone who can provide leadership and plays the game the right way. Manny can still hit and takes walks but that comes with a lot of strikeouts. If they come with diminishing power, you have to question how productive he will be, assuming he'll stay healthy.
In my opinion, Vlad is the better option. I don't like all of the antics that come with Manny. For a young team, I would rather have Vlad. I wouldn't want the younger players to follow Manny. Also, I believe they may provide similar productivity, I would still pick Vlad over Manny as the Rays' DH. I'm curious who would you pick: