Nintendo DS Vs Sony PSP !

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http://www.joystiq.com/2006/02/19/four-rules-for-the-ds-and-psp/

Given that US [corrected] sales for the PSP recently surpassed US sales for the DS, it could be argued that Sony's higher price point for the PSP hasn't been a major barrier to sales.

PSP exceeds DS's sales in the U.S.

But only in the U.S, globally DS still is the most selling, especially in Japan.