I think I agree with Diesel in opposite threads. The Nintendo DS is good and so is the Sony PSP. But what seperates the two is that the Sony PSP was invented in first place to the "older" generations or adults that have outgrown the Nintendo games and want a multimedia experience (music and movies). Even if it was fragile the person holding it probably is under a 401k plan, have insurance, and have steady income and would take care of it like it was some other household equipment. The resolution of the graphics are obviously superior on the PSP. It might be fragile and it might be worrysome to losing some pixels but that's something you get in laptop screens. It happens, you just got to take care of it. It's like comparing a "Plasma TV to a LED crystal screen". Obviously you'll take care of either but because Plasma TV's cost you'll probably watch more carefully. As for the Nintendo DS it is a great concept with it's stylus and double screen. I also have heard about how much easier it is to purchase games and it's battery life. The resolution isn't high but it serves its purpose for the games intended. It is a neat setup and as an adult myself I still adore some Nintendo games.
***** But logically and mathematically the DS is more suspectable to having most damage done since it's housing is into two parts than the one part the PSP is in. Everybody I know that owns a flip phone (TWO parts) ruins their phone when they leave it OPEN and sit on it or drop it. I'm not saying the PSP wouldn't get damage but sitting on it probably won't break it since it's surface area doesn't come at large angles. On either one if you take care not to break it they'll both be nice. I'm not interestetd in handheld gaming myself but if I was I would probably just buy both despite battery life/screen resolution of either.....
I would probably buy both just to prove which is better. I could scientifically point out every flaw from either one and PROVE which is the better that's because I would probably use BOTH. I could start by the material it's made of....(one major reason I went with Mac Powerbook, it's scratchproof........) But really who cares which is better? again it's comparing a Manual to a Automatic in car transmission. I think they provide different levels of entertainment at different costs, different accessories for different demographics (age group to be specific). So enough of proving by loud this and loud that (I agree Diesel) or snaps. Talk about it logically. Did you test out the PSP to know it's fragile; you owned it for long period; did you get warranty; did you time battery life (obvious movie will suck more battery) to DS, that means you own both? Some things to consider....