Originally Posted by Scrap Irony
I think they project Hamilton filling out and improving his SH stroke as he matures.
They might also count his speed-adjusted slugging percentage as possible "found" power.
IMO, Hamilton's a better bet to have more doubles and triples due to his speed and willingness to be aggressive as a baserunner. Gregorius likely will have more HR, but not enough to make the difference in their power numbers all that noticeable.
While this could be true, generally speaking, the "power" label is for home runs, not a slugging percentage type of deal.