Citation is definitely needed, but I would suggest that it depends on your definition of popularity. I think the PSP was king at least in terms of desirability.

Citation is definitely needed, but I would suggest that it depends on your definition of popularity. I think the PSP was king at least in terms of desirability. (I may be biased though as my web development career started with making PSP portals ) PSP was substantially more expensive than the DS which would have affected the sales (especially when the DS was such a worthwhile console to own.)