Thanks, I guess I thought pitcher WAR was heavily FIP weighed but I guess Broxton and Cain taking away HR's has to matter too. I was looking at BR before posing this knew I was missing something there and that was it. Baseball-reference WAR uses RA9 (Runs allowed per 9 innings) while adjusting for defense as the basis of their WAR (bWAR or rWAR) calculations, while Fangraphs (fWAR) uses FIP, though they also offer RA9-based version. Baseball Prospectus uses their own DRA (Deserved Run Average) stat as the basis for their WARP. They use different, but very similar for bWAR and fWAR, calculations for offense as well. Less similar (DRS (bWAR) vs UZR (fWAR)) for defense, and I'm not quite sure about baserunning. I believe the only one that really tries to capture a catchers value, including framing, is WARP. For position players, due to DRS and UZR sometimes differing a lot, I think it's usually best to average out bWAR and fWAR. For instance, Cain leads the NL with 5.3 bWAR (Carpenter and Freeman follow at 4.6) but is 6th in fWAR at 3.6, with Arenado (4.4) and Freeman (4.3) at the top. For similar reasons, always remember that small differences in WAR aren't very meaningful; you can't say that a 4.3 WAR player is better than a 3.9 WAR player, just that they're both in all likelyhood better (or were more valuable in the time period being compared) than a 2.5 WAR player. It's just a rough estimate of their combined worth over a certain period of time. For pitchers, fWAR and BWARP would be better at predicting future performances and isolates actual pitcher performance better, but bWAR reflects the outcome and results better. And for comparing catchers only WARP really even tries to properly value defense at the position. Sadly, I find the Baseball Prospectus stat pages to be very user-unfriendly and clunky.