3rd party DS vs PSP looks even at first. But then you realize that a large chunk of the PSP's 3rd party offerings were just bad versions of games that were on PS3/360. DS on the other hand has a 3rd party library that is unique to the DS. Or to put it another way... PSP was mostly a 3rd party port machine, while DS got its own exclusive 3rd party games.
One 1st party enters the mix it's pretty much over for PSP.
Don't get me wrong, I love my PSP, and will eventually have about 20 games for it. But it doesn't hold a candle to the DS. In many ways DS vs PSP was the exact opposite of Gamecube vs PS2.
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