About the SKU's, i see people saying the X360 also had many. But the main difference is, that not much changed between them. The only big differences were basically added HDMI port and now 60GB for the Pro instead of 20GB. Other than that, the motherboard etc changed, but that's no difference to most users because they just buy a console and never bother to look what's inside.
With the PS3 it's another story. Backwards compatibility changed, memory card slots changed, usb ports changed, hard disk size hanged, controllers changed, and the thing is, you can't see the difference easily on the outside of the box, because they basically all look the same.. It basically only shows the hard disk size. With the X360 it shows very clearly which one is arcade, pro and elite. So yeah...
Truth does not fear investigation
