To have a fair software comparison between X1 and 360 titles still involves multiplication of some type since the X1 has sold 1/3 less hardware. Plus the software totals are much more incomplete on the X1 since a lot people buy their games digital now. On the 360 a lot of people never bought their games digitially or only a small amount espeically the people that only had a 20GB or 60GB HDD. Running out of HDD on the X1 is easly solved since it takes almost no effort to expand you HDD space via a external HDD.