TWRoO on 24 October 2008
PSP 3000 will be/has been released worldwide so it's not a fair comparison. (although DSi still has a chance considering PSP 3000 isn't making much of an impact outside Japan)
DSi will have less time to sell by a couple of weeks, but also is only releasing in Japan.
If you were to compare DSi to PSP 3000 in Japan only, i would be a fair comparison, but you would be wrong as DSi should outsell PSP3000
