hang on very "few" champs win in the best car?
That was a typo. I meant to say "As stated before, very few champions have won when not in the best car, and Lewis is arguably one of those few in 2008 with the Ferrari having just a bit more pace that year. So he did it under both conditions."
The thing is with your outscored stat, is that we don't rate drivers on a 3 year schedule, but every year, so that number is IMO meaningless. I could produce another meaningless stat as well that swings it the other way...for example: if we remove any race where either or both drivers did not finish during those 3 years, for whatever reason (mechanical, collision, etc), so we have a straight head to head comparison (in other words, only points counted are events where both drivers crossed the finish line), Hamilton outscores Button 559 to 485. I find this to be more of "equal footing" since retirements caused by mechanical issues are almost always not the fault of the driver...but it is still a meaningless stat, because some retirements were the driver's fault (certain accidents).
We do however rank drivers based on yearly performance, and that's where Lewis beats Jenson 2-1.
For the record, I don't think Hamilton is the GOAT, nor does F1 truly have a GOAT due to the different conditions/technologies each era fought under, but only several "GOTT's" (Greatest of That Time), of which I think either Hamilton, Schumacher or Alonso deserves that title for this generation (last 20 years).
Anyways, dropping it, as we'll be going around in circles.