Yeah, BIG difference in power. Ells and Gardner have the same amount of homers and Gardner's SLG is higher by 70+ points. I am telling you right now, that the power they offer will be minimal regardless. The whole message that I am trying to get across to you is that for these guys, OBP will be supreme. When they are on base, things happen. Pitchers need to worry about them, catchers need to worry about them and they can take the base anyway.
And btw, Melky is having a better offensive yr than Ellsbury too.