Well Dustin Ackley has a 98wRC+ while being above average in the field and a tick above average on the bases and has put up 1.8 WAR. Matt Holliday has a 122wRC+ while being below average in the field and has provided -0.7 runs of BSR. He has 2.1 WAR while having an extra 100 PA. Pretty equal value and one is your prototypical LF while the other doesn't hit very well but still gives you the same value and at a much lower price.