i have both bought psp den ds in a year later.emm.both are jz great .but i stick to ds the most

ds has innovative gameplay .not jz button smashing.graphics are low detail compare to psp.but never sucks.some fo the games still have eye catching moment ninja gaiden,ff series,etc etc.due to the large party of developer.games keep coming up.

psp has e really big screen.wide screen:D suits for watching movie,mv,mp3,etc etc.still wow by it when switching console.hehe.elegent design. games on it have better graphics.mostly.maybe have longer gameplay compare to ds.cuz its running on umd.gow,ff,nfs,etc etc.