A DS Lite is smaller

Besides the size? There are a few differences. First of all, the control layout is slightly different. The Select and Start buttons are below the ABXY buttons rather than above, and the Power switch (formerly a button located above the D-Pad) is now a switch on one of the sides. Also, there are different brightness settings for the screens, which makes the screen easier to see in some lights. The two portables work the same otherwise, however--there aren't any other functional/technical differences I know of.

The Nintendo DS Lite offers a smaller, sleeker package with a brighter screen, larger stylus, and a longer-lasting rechargeable battery than the original Nintendo DS. The unique game play features and wireless connectivity remain intact http://www.nintendo.com/consumer/systems/dslite/faq.jsp#difference

da difference is that da ds lite is lighter and brighter dumbo!

They both are about the same, but of course there are differences. Comparing the DS and and DS Lite, The DS is lighter in weight, and more compatibale. It has more brighter screens than the original DS. The original DS has it's own wire connenction, using it to trade link to link with using the wires. Of course, there's always the Wi-Fi, but this can be used as an advantage from older GBAs. First picture - Original DS Second picture - DS Lite

They're almost exactly the same the only major differance is the shape, it's slimer, lighter. I actually like the original better though, the Lite seems to fragile and stuff.

i ds lite just have a liter screen and differnt turn on buttons and a different size pen

The Nintendo DS is a dual-screen handheld game console developed and manufactured by Nintendo. It was released in 2004 in Canada, the United States, and Japan. The console features a clamshell design, similar to the Game Boy Advance SP, with two LCD screens inside—with the bottom one being a touchscreen. The Nintendo DS also features a built-in microphone and supports wireless IEEE 802.11 (Wi-Fi) standards, allowing players to interact with each other within short range (10–30 m, depending on conditions) or online with the Nintendo Wi-Fi Connection service, which launched later in the console's lifespan. This was the first Nintendo console to be released in North America prior to Japan. The system's code name was Nitro, and this can be seen in the model number that appear on the unit (NTR-001). The console's name officially refers to "Developers' System", in reference to developers of new game designs the system was meant to inspire, and "Dual Screen", the system's most obvious and distinct feature. On March 2, 2006, Nintendo released the Nintendo DS Lite, a redesign of the Nintendo DS, in Japan. It was later released in North America, Europe, and Australia in June 2006. The DS Lite is a slimmer and lighter version of the Nintendo DS and has brighter screens. Nintendo of America refers to the older model as the "original style" Nintendo DS. It is often affectionately referred to by fans as the "DS Phat." On October 2, 2008, Nintendo announced the Nintendo DSi, another redesign of the Nintendo DS, at the Nintendo Fall Media Summit. It was released in Japan on November 1, 2008 and in North America, Europe and Australia in June 2009. The Nintendo DS Lite is a dual-screen handheld game console developed and manufactured by Nintendo. It is a slimmer, brighter, and more lightweight redesign of the Nintendo DS, designed to be aesthetically sleeker while taking styling cues from the Game Boy Advance SP, and to appeal to broader commercial audiences. It was announced on January 26, 2006, more than a month before its initial release in Japan on March 2, 2006 due to overwhelming demand for the original model. It has been released in Australia, North America, Europe, New Zealand, Singapore, and defined regions in South America, the Middle East, and East Asia. As of June 30, 2009, shipments of the DS Lite have reached 82.26 million units worldwide, according to Nintendo. The Nintendo DSi is a handheld game console produced by Nintendo, and the third iteration of the Nintendo DS handheld gaming console, following the Nintendo DS Lite. As a seventh-generation console, the DSi primarily shares the handheld gaming market with Sony's PlayStation Portable. The handheld has launched in Japan, Australasia (Oceania), Europe, and North America between 2008 and 2009. Most of the DS Lite's attributes are retained with fewer aesthetic changes made compared to the first two iterations. A major feature that distinguishes the Nintendo DSi is its two interactive digital cameras that can be both incorporated into gameplay and used as a standalone camera feature. The DSi also includes connectivity with an online store as well as internal and external storage of content. Nintendo began development in late 2006, and unveiled the console in October 2008 during a Nintendo Conference in Tokyo. After the success of its predecessor, the goal of this handheld is to narrow the gap between DS units owned per household and actual DS users per household. The features Nintendo integrated into this DS attempts to create a more personalized experience to appeal to each individual of a household.