I would almost bet that the Royals will tank.
Royals offensively have 3 players above the average line in wRC+ Gordon (128) Perez (102) and Cain (101) even Butler and Hosmer their supposed mashers are below that mark. Pitching has been excellent, Shields, Vargas, Duffy, Ventura, and Davis have all been exceptional. Tigers though are offensive juggernauts, Miggy, V-Mart, and JD Martinez are all hitting over Gordon, And for their above avergae hitters on the year add in when he was there Jackson, Kinsler, and Hunter. And it's not like Detroit's pitching has sucked either, Scherzer, Sanchez and Porcello are very strong, Verlander's peripherals have been solid, Price's peripherals have been dominant, their pen though leaves much to be desired. What's seemingly seperating those 2 is luck. Which I think the Royals focus on defense and baserunning can play a part in that. According to Fangraphs, the ROyals have the best defense in the AL. 4th best in the majors. Offensively they're horrible. Even with the DH they're barely ahead of us and the Mets.