Hmmm, I guess it depends on a few things.
If you take the sinker pitcher, is your infield of a suitable quality (or going to be) to handle the ground balls coming their way?
What are you like financially? Maybe you have to take the sinker pitcher as he is the cheapest option?
I personally very rarely take a player who has a "negative" personality, regardless of what it is.
I like everything about "slugs" apart from his 1 point changeup.
Yeah, if you don't care about his personality, Vlad is my guy. If you do, hmmmm, maybe "The Colorado Missile"