Given an impartial arbitrator to judge the intelligence of the arguments, I think I would probably take that bet, at least for cell phone or laptop scale purchases, rather than something like a house or car, where the decisions are usually made over much longer timeframes.

However, regardless of which decisions people argue for more persuasively, it doesn't really prove much, because these types of explanations overwhelmingly tend to be justifications people create for themselves, rather than the true reasons underlying their decisions.