while i wouldn't say half a win is meaningless, it's actually a difference of .8 I'm seeing 5.1 vs 4.7. Regardless, WAR has standard margin of error - any derived statistical indicator has one. Lowest suggestion I've seen is 15% and I believe the highest I've seen suggested is 2 WAR per year. So .4 is absolutely meaningless; even at the lower 15% the .8 would be borderline. Now there may be other schools of thought on what the margin of error may be, but even it it were lower - 15% is pretty low to begin with - there is still a margin of error; so small fractional differences aren't meaningful. fwar is 4.9 vs 4.1, bwar is 5.1 vs 4.7