"The chart below shows the August sales ranks for Madden NFL 11 on the PS3 and Xbox 360; sales ranks were captured between August 2 and August 31, 2010. The game released on both consoles with a MSRP of $59.99.", says CoffeewithGames.
CwG also say, "Will Madden NFL 11's first month sales increase for both consoles over Madden NFL 10's? Or, will Madden NFL 11 see another year-over-year decrease in initial month sales on the Xbox 360, versus the PS3's gain?"
CwG says of the chart, "You may not have noticed the asterisks marking August 13, 14, and 15 on the sales graph, but on those days, I recorded only the Xbox 360 version of Madden NFL 11 discounted to $49.99, the PS3 version was not discounted to $49.99."