Yes, that is a small difference, because the series was biggest in Europe, where it is a much closer contest. In America, Burnout on 360 outsold the PS3 version by more than 3 to 1.
To your comment about PS2 in 2001:
Yes, and that is exactly why it is crazy. It can't sell that much when it doesn't have as many exclusives, and when it costs twice as much. Final Fantasy X, Gran Turismo 3, and Grand Theft Auto 3 were all released that year, and they were all exclusive. Without GTA's exclusivity and the other 2 not coming this year (except for maybe in Japan), the PS3 has no chance of selling that well.