Why would you choose the bad guy? There are always dangers in associating with bad people. You haven't even said you like him. But if you like someone bad, it says something about you! However, don't treat people like commodities to choose. You are not selecting a chocolate from a box, a toy from a shop, or a car from a show-room. The inter-personal relationship is most important. Someone you can share your interests with - your hope and dreams, laughter and tears, problems and delights.
Neither one of them. If you cant decide which one you want than you probably dont truly want either one of them. The bad boy may not be what you want in a relationship because he would lie and cheat etc. If you were interested in this other guy enough to really like him you would not be considering another guy. So really neither guy would probably be worth your time. Why not just be friends and later on if you start to develop real strong feelings then act upon them.