iPad 4: 9.7 inches 2048 x 1536 264 ppi
Nexus 10: 10.1 inches 2560 x 1600 300 ppi - Winner
Pad 4 still has the same retina display as the iPad 3. It features a ingerprint-resistant coating.
I own a iPad 3, the display is simply amazing, especially when using it to view a magazine.
iPad 4: Dual-core Apple A6X 1.5GHz
Nexus 10: Dual-core Samsung Cortex A15-based 1.7 GHz Exynos 5250 - Winner
Apple A6X is a new dual-core CPU combined with quad-core graphics. According to Apple, it is up to twice as fast as the previous-generation A5X chip.
Samsung Exynos 5250 (also called Exynos 5 Dual) is the world’s first mobile processor built on ARM’s new A15 architecture. It supports WQXGA (2560×1600) resolution, 1080p 60 FPS video and USB3.0. This CPU is also used on recently released Samsung Chromebook.
Both processors are based on 32nm length technology which is more advanced by the previous 45nm length. Exynos 5250 has higher frequency (1.7GHz vs 1.5GHz).According to Benchmark Testing, Exynos 5250 handily beats A6X in all aspects by a large margin. Exynos even beats Intel's Atom and Quad-Core Tegra 3 (Quad-Core does not mean performance is better than Dual-Core). It maybe one of the fastest mobile CPU on the market.
It is interesting that A6X is also manufactured by Samsung (it is designed by Apple). So this explains which CPU is better.
iPad 4: 1GB
Nexus 10: 2GB - Winner
The size of the RAM is important to multi-task performance. The bigger the RAM, more apps can stay in RAM so that switch will be much faster.
iPad 4: Mono Speaker
Nexus 10: Dual Stereo Speaker - Winner
iPad 4 speaker sound is pretty good (comparing with Nexus 7). But Nexus 10 has two stereo speakers both front facing.
iPad 4: No NFC Support
Nexus 10: 2 NFC Support
NFC is getting more and more important. It allows you easily share photos, videos, contact, web pages and more between two NFC supported device by just simply touch each other. Here is an video show how to do it.
iPad 4: 241.2 x 185.7 x 9.4 mm
Nexus 10: 263.9 x 177.6 x 8.9 mm - Winner
For tablet, the most important size is the thickness. In this case, Nexus 10 is thinner than iPad 4, thanks to the thinner Corning Gorilla 2 Glass.
iPad 4: 652g
Nexus 10: 603g - Winner
One of the complain to iPad 3/4 is it is too heavy. You can not hold it for long. Nexus 10 is doing slightly better in terms of portability due to its plastic case.
iPad 4: iOS 6
Nexus 10: Android 4.2 - Winner
Since Android 4.1, Android already catches up with iOS in terms of the smoothness of user interface with the "Project Butter". With the introduce of Android 4.2, now it is iOS who play the role of catching up. Android 4.2 brings many new exciting new features. The most important one is the multiple user support. Each person who shares the same tablet can have their own home screen, background, widgets, apps and games – even individual high scores and levels.
Google Now is also enhanced in Android 4.2. It can provide information before you even ask. Now it can read from your Gmail and provide information like package tracking and flight information.
Compared with Android 4.2, iOS 6 only brings some minor upgrades like integration with Facebook, Passport. The new Apple Map is a even setback from the Google Map.
iPad 4: 275,000 Apps Designed for iPad - Winner
Nexus 10: Much less Apps Designed for Tablet
This is biggest advantage of iPad over Android tablet. There are many gorgeous apps can be only found on iPad. Even the apps which has both version, the iPad version usually comes out first and looks better. One example is the must-have reading app Flipboard. It first comes to iOS and just recently comes to Android. Nexus 7 can have Flipboard but it is phone version. There is still no Flipboard for 10 inches Android tablet.
iOS Newstand app supports more magazines than Google Play Magazine, including National Geographic.
Developers can not ignore the 1 million Nexus 7 sold for every month. With the introduce of Nexus 10, more developers will develop apps for Android tablet since there will be more users.
iPad 4: - Winner
Although the design has not been changed much since iPad2, iPad is still the most beautiful tablet. The Aluminum case feels solid and upscale. The smart cover is very convenient.
iPad 4: 11666 mAh - Winner
Nexus 10: 9000 mAh
iPad 4 can have 10 hours of usage under Wi-Fi while Nexus 10 only have 9 hours. For standby time, I expect iPad 4 will be better than Nexus 10 according to my past experience of using Nexus 7 and iPad 3. Apple is really good at battery technology. You can leave a iPad for a month and still find it has battery. While my old Transformer Tablet can only standby for 3 days. This may be the biggest advantage against Android tablet. Hope Nexus 10 will be better than Nexus 7 in terms of standby time.
iPad 4: 5MP 1080p rear, 1.2MP 720p front - Winner
Nexus 10: 5MP 1080p rear, 1.9MP 720p front
Although Nexus 10's front camera has more pixel, I still think iPad 4's camera is a winner. iPad 4's camera has backside illumination and a f/2.4 aperture for low lit photography. According to the experiences with previous Nexus devices, camera is always a weak point. But hey, who cares about the camera on a tablet?
iPad 4: $499 (16G), $599 (32G)
Nexus 10: $399 (16G), $499 (32G) - Winner
Nexus 10 is $100 less than iPad 4 for the same storage size but the difference is smaller than the difference between Nexus 4 and iPhone 5 ($349 vs. $699 for 16G). Amazon Kindle Fire HD 8.9 has cheaper price of $299. However, its display and processor can not compare with Nexus 10 and iPad 4.
If Nexus 10 price is $349, it will be a killer (even iPad Mini costs $329). I expect Nexus 10 price will drop $50 in half year (similar to Nexus 7).
Nexus 10 will be available to purchase on Nov 13, 2012 though Google Play Store. US price is $399 for 16G, Canada price is $409 for 16G.
In summary, Nexus 10 has advantages on display, power and features provided by Android 4.2. iPad is good at battery, design and more applications.
Nexus 10 Hands On