Well I don't think the PS3 is as strong as the 360 and I know that more people have a 360 so it makes sense that that's the better version right? if you like your PS3 that's cool but it makes sense if you think about it.
The PS3 is actually the more capable platform of the two (a good PC will kick the snot out of both). As I said, the specs are roughly the same (a bit better CPU on the PS3, a bit nicer GPU on the 360), but they are both relatively the same in terms of hardware capabilities. However, the PS3 is guaranteed to have a hard drive (mandatory hard drive installations can help a lot with load times) and the PS3 has a far superior disk format (Blu-Ray). The space constrants people are complaining about are due to a lack of mandatory hard drive installations on the 360 (due to not all coming with a hard drive) and the use of only a single DVD being allowed. That higher price tag on the PS3 isn't due to Sony charging a ludicrous amount of money out of greed, it is the case because the PS3's Blu-Ray drives and hard drives drive up the cost of manufacturing PS3s.