I've said it before I honestly have no ill will for the sox. But if I had to give an honest assessment it would be I don't think they have enough offense. Eaton, Melky, LaRoche and Abreu probably makes up a decent 1-4. However, after that it gets some what sparse. Ramirez, Bonifacio(assume he's 2B) and Gillaspie are all below average. Flowers is well below average. Garcia like most of the cubs players is a giant question mark. This is especially true when you're talking depth. If any of the top 4 guys goes down that line up gets pretty ugly pretty fast. There's no real game changing offensive players in the minors. Micah Johnson could be ready but he's not really exceedingly better than Bonifacio. Their starting pitching may be tops in the AL and probably is top 5 in baseball especially if Rodon is ready soonish. Bullpens are anyones guess. Overall, if the Sox were an NL team I think they'd fair better this coming season but as an AL team I think they will struggle to score runs and even though they have a really nice staff I'm not sure they can pitch themselves out of that where as if they were in the NL scoring runs would less important given the lack of DH.
With the cubs everything comes down to what they get out of their young offensive players. Their pitching should be good possibly even better if Hammels and Arrieta weren't flukes. I could easily see them wining 70ish games, 80ish games 85ish games depending on how well their prospects play.