Unless those columns are misaligned, it shows XBox 360 selling less units than PS2? Even now!? Not only is PS2 very old technology ( older than XBox and GameCube even, I think? ) but it's also way out in front already, so you would imagine that PS2 would be close to saturation point by now. And 360 is still selling less units. If that's not a flop, I'm struggling to imagine what would fit your definition.
These figures suggest there's not a lot in it, but PS2 has been outselling 360 in America every month for some time...
http://www.vgcharts.org/usaconscomps.php?name1=X360&name2=PS2&type=0