UBS suit Ben Schachter says that World Tour is outselling 2 stateside, the investment analyst having looked at November's data, which reveals Activision's hit was a million copies ahead of EA's challenger for the month.

However, Schachter's analysis is a little more cunning than this - revealing that while Guitar Hero has sold more, it's sales are actually in decline versus 2007, while Rock Band is on the rise.

Apparently, while Guitar Hero still rules the roost, sales are down over 25% on last year, while Rock Band's numbers are up a whopping 64%.

Apparently, overall music genre sales are down 12% on last year - the UBS man speculating that the market could be saturated.

Schachter offers: "With and others sure to bring new innovation to the genre next year we can't count it out, but it almost certainly won't be the growth driver it has been over the past two years."

Thanks GameSpot.

By Luke Guttridge