I think if you still underestimate Button it's you with "your head up in the clouds". If forced, I would put my money on Alonso too, but the simple truth is there's no way to tell with certainty until it happens.
Do you accept that the 2011 Ferrari was significantly worse than the Mclaren? If you do, then Its quite clear that in equal cars it would not even be a contest. Underestimating Button depends on your definition of the word. Yes he has been impressive, and is a pretty good driver, but absolutely nothing in his career suggests he is Alonso calibre, which is what he would need to be to push him in equal cars.
Lets take a look at Buttons two best years, the years which apparently prove he is top top level.
Won the title but on closer inspection, only beat Rubens , a 37 year old rubens by 18 points. Alonso level driving? Not even close.
Beat Hamilton over a season. Impressive, but at the same time struggled to beat Alonso by 13 points despite having a clearly superior car in about 15 out of 19 races.
And these were Buttons best seasons. First impressions can be very misleading. Like I said, good driver, but not in the top class.
The only underestimating going on around here is of Alonso. We are talking about a Senna/Schumacher level driver, and you are comparing him to likes of Jenson Button.
Edited by address, 11 April 2012 - 07:38.