I know, I know, neither of them are out yet, but this is a rumor and speculation site. Hence the name Mac Rumors. Anyway, here are the specs. Add as you wish. The Nintendo 3DS has two screens; the top screen is a 3.53-inch 3D screen with a resolution of 800x240 pixels (400x240 pixels per eye) that is able to produce a stereoscopic three-dimensional effect without 3D glasses, while the bottom screen is a 3.02-inch non-3D touch panel with a resolution of 320x240 pixels. The 3DS weighs approximately 8 oz. and, when closed, is 5.3 inches wide, 2.9 inches long, and 0.8 inches tall. The Apple iPhone 4 has one screen with a resolution of 960x640 pixels (326 ppi) that is able to produce text and images that are so smooth that individual pixels cannot be seen by the human eye at normal distances for usage. The iPhone 4 weighs approximately 4.8 oz. and is 2.31 inches wide, 4.5 inches long, and .37 inches tall. Winner: Apple iPhone 4. The iPhone has a higher resolution screen, and it's covered in extremely durable helicopter-windshield-like glass on both sides. Personally I think 3D is a gimmick and I've heard that many people get nauseous after using it for extended periods, which is exactly why they've put a slider on the 3DS (see below), because you'll probably be turning it down/off after a while. I love the premise, but I think it will be underdeveloped by 3rd parties, like everything else Nintendo makes. All of Nintendo's 1st party stuff will rock per usual. The 3DS is much more portable than its predecessor, but it's almost twice as heavy as the iPhone 4. The 3DS features several additions to the design of the original DS, including a slider on the side of the device that adjusts the intensity of the 3D effect, a round nub analog input called the "Slide Pad", an accelerometer, and a gyroscope. It has two cameras on the outside of the device, capable of taking 3D photos, as well as a camera positioned above the top screen that faces the player; both cameras have a resolution of 640x480 pixels (0.3 Megapixel). The system will also have a "Movie Record Mode", and will have the ability to play 3D video content. The 3DS also possesses Wi-Fi capabilities and periodically searches for Wi-Fi hotspots and other 3DSs without user input; there will be no monthly fee for Nintendos 3DS online access. The iPhone 4 features several additions to the design of the original iPhone, including a stainless steel frame that acts as an antenna for Wi-Fi and cellular signals, and a gyroscope (3-axis), in addition to, the 3G's proximity sensor, ambient light sensor, assisted GPS, and the 3GS's digital compass. It has two cameras, one on the front of the device with an LED flash, and a 5 Megapixel camera on the back for more professional photos. The iPhone 4 also has the capability to record HD video (720p) at up to 30 frames a second with audio and comes with iMovie for iPhone, an app for editing video directly on your iPhone. It's also compatible with Bluetooth 2.1 + EDR wireless technology and can video conference via a Wi-Fi connection. AT&T is the exclusive carrier in the US and there are monthly fees for internet use. Winner: Apple iPhone 4. Both devices are swimming with cutting-edge technology from touch screens to 3D displays. The iPhone edges the 3DS out by adding more sensors and higher quality components, but the premise of taking 3D photos and videos is very intriguing. The monthly cellular and data fees coupled with having to deal with AT&T's sub-par services doesn't help Apple's case though, and traditional games are easier to play with traditional control schemes, like analog nubs and buttons. Apple's got the edge in price and distribution though, as Nintendo still lags behind in this department (The DS Shop Channel is not iTunes by a long shot.), not to mention that Apple's device is far more versatile with its ability to watch movies, listen to music, surf the web, and access over 225,000 apps and counting, although the Nintendo 3DS could catch up somewhat. I personally think it will be too little, too late, as it is not scheduled to be released until the Spring of 2011. That gives Apple an 8-month head start. The Nintendo 3DS will be compatible with both Nintendo DS and DSi games, and a new generation of 3DS games: launch titles include Kid Icarus: Uprising and Mario Kart 3DS, and more than twenty companies have signed on to develop for the 3DS, currently supporting a list of over 70 3DS titles. The Apple iPhone 4 will be compatible with all previous apps and a new generation of apps for iOS 4. Hundreds if not thousands of companies have made and will continue to make apps for the Apple iPhone and Apple's iOS devices, with over 225,000 apps available. Winner: Apple iPhone 4. While Nintendo definitely has the upper-hand in the IP department with titles like Kid Icarus and Mario Kart, I'm surprised at how many big name developer are porting and at times creating new IPs for Apple's iOS devices. Square Enix, Capcom, and a whole slew of other big name developers are on board with Apple.