When all other things are equal, you take the guy who has the advantage in the one area that is not. I realize this, but how much more valuable is the player with the higher average? I realize a single more than likely drives in a run then a walk...but again....I want to know how valuable that hit is. i take the guy with the higher isoD, and i'll tell you why: isoD is generally a more consistent statistic than BA. when the guy who's hitting .330 inevtiably hits a slump and is down around .270, his OBP will be at (assuming his isoD is remaining static) .320. conversely, when the guy who's hitting .270 gets hot at the plate, (remember, isoD is static) and his average jumps to .300, his OBP is at a whopping .410, which is unbelievably valuable to winning. the next year, the guy with the high isoD will invariably put up a good to great OBP regardless of whether his BA is at .260 or at .330, while the guy with the lower isoD will be very unpredictable. Good point. This is why a guy like Rickey Henderson still had a .387 OBP when his average was .219 with the Mets.