Guys call me crazy but I was looking into some stats and Willingham is having a much better season that Holiday.
Holliday is currently rated 52nd in VORP, or +23.6, vs. Willingham's 61st, or +21.6. However, Holliday has 392 PA's vs. only 249 for Willingham so it's clear that Josh has been the more productive hitter when in the lineup vs. Holliday.