They sold about evenly:http://www.tri-ace.co.jp/en/company/sales.html
SE is in a bit of a tight spot right now. They have always put their money in Sony's pot, but with the PS3 not selling that well in Japan, the western market is their next best bet, which means that the 360 is the safest route to take, because PS3 sales have been sluggish over here, also.
We'll miss you George.
PSN:Puzzleface
XBL:XpuzzlefaceX
My friends call me Hadoken because I'm down-right fierce