I'm pretty sure my head is going to explode.
Comparisons are rarely great. The Kubel/Arcia comp not great either, but workable - lots of value tied into the bat, serviceable fielder (pre-injury for Kubes).
As for Rosario, he's very much like Span. He gets the barrel through the zone in a hurry. He'll have a ton of doubles and hit for a high average. While Span is more of a prototypical leadoff hitter, I think Rosario fits better in the 2-hole ESPECIALLY IF HE STAYS AT 2B! :)

