The fact that there is such a huge discrepancy between the two leading sources of WAR is practically limitless ammo for skeptics of that stat, and by extension, all such stats.
I have come to a point where I generally accept WAR (with salt) in arguments around here without getting into that aspect of it, but I think this highlights exactly why many people look down on it.
I have to agree. The massive difference really rather invalidates the usage of the stat. There is no excuse to have such a large variation on the exact same stat. That two sources can come up with so big of a difference makes it far less ideal for making arguments based on WAR solely. I never realized such a discrepancy existed before today. It certainly looks like Fangraphs is less... Ideal. It seems like they put forth inflated WAR compared to B-R. Aside from Morse and Willingham, who the hell are these "replacement" OF'ers that yield most of our AAAA trash having a positive WAR?
Bottom line, one site has Morgan with a positive WAR. One has Morgan with a negative WAR. Nyjer Morgan, this season... It scares me to think the average replacement player really would contribute less than Morgan in CF. Willie Harris had a 0 WAR according to Fangraphs. So 2010 Willie Harris equals the average replacement player? Personally, I'll take B-R with Harris having a -.8 WAR over Fangraphs. But regardless, this definitely shows to me at least how subjective and relatively useless when getting in detailed debates about players using WAR. And I'll say it again, Fangraphs WAR, while possibly more widely used, seem quite inflated by themselves. In comparison to B-R WAR, they seem downright astronomical.