Pros better volume slide
power button on the inside
slightly bigger screens
Cons less battery
not very good battery life
not many games using the camera
no gameboy slot
no usb slot
Summary here's the bottom line: the nintendo dsi is a great system, but it seriously laggs in games you can get. they added great features, but they did away with others as well.
just for clarafication: I have heard that the dsi pictures only look good on the dsi screen. this is not true. if you get a sandisk sdhc card, the picture quality is great.
Pros playing music and photos and sounds.
Cons it has a bad web browser.
Summary i like the matte finish and the camera.
Pros dual cameras
nice features and apps
cant play gameboy advance games
Summary I have just gotten the dsi and it is a very good gaming system. The games are fun most of the features are easy and fun to use.
The big flaw in the dsi would be the wifi setup, for some reason i could not connect to a network that my neighbor, who has a ds lite, can connect to even when the network is not secure.
Cons -Non-GBA compatibile
Summary Recently, I have bought this game system and so far, its great. I love the Camera feature and I love that you can shop for video game and DSI ware at the DSI Shop. There are, however, some features on the Camera that I don't like; the morph feature, I was expecting to be the best, but when I first tried out, I was disappointed that it barely works, and other than that, I love the DSI Camera. I don't really have to worry about the Game Boy Game Un-Compatibility because I don't have any, but if you have a lot of Game Boy Games and you don't want to let go of them, the DS Lite is for you. Overall, the Nintendo DSI is a truly impressive game system with many features and I love it.The best feature of all is the internet. The browser is amazing! It is faster and simplier than my PSP's one. I love the ability of the two screens. The only feature I don't like is the column view. But I just don't have to use it!
Updated on Dec 13, 2009
Pros Camera features and software make it a solid buy
Cons none yet, seems solid
Summary Lots of extra features over the DS Lite. Has a lot better firmware and the cameras alone have added a lot of fun for my 11yr old daughter. She traded in her DS lite and got this DSI and is very happy with it. She feels it was a huge upgrade for her, so thats all that matters to me. Shes very pleased therefore so am i.