AnandTech ran comparative benchmarks on iPad, iPhone 3GS and Nexus One to see how Apple’s new A4 SoC stacks up against the Samsung chip in iPhone and Qualcomm Snapdragon QSD8250 chip in Nexus One. The Snapdragon will also be used in many tablets coming later this year, so this comparison should give an idea of what we can expect performance-wise from those tablets. AnandTech ran two tests, in the first test they recorded load time for various websites and in the second test they used WebKit SunSpider JavaScript Benchmark tool.

In the website test, iPad’s A4 was on average 22.5 percent faster than Qualcomm’s Snapdragon. The difference was as little as 8.7 percent for website like Digg.com and as high as 59.4 percent for Engadget.com. In all the tests iPhone 3GS came last showing that Apple needs to update the iPhone lineup. In the SunSpider JavaScript Benchmark, iPad again came on top with 37.6 percent performance advantage over the Snapdragon.

Both the tests clearly showed the performance advantage Apple A4 chip offers iPad. Anand Shimpi wrote in the article “The A4 is particularly exciting because it combines Snapdragon like CPU performance with a PowerVR SGX GPU. A much better option than the aging ATI core used in Qualcomm QSD8x50 series.” This means that if graphics performance is compared between the two chips Apple will gain further advantage.

Also in iPad related news, the teardown of iPad has revealed that the main board of iPad is very similar to that on iPhone. Like the iPhone, it uses chips from Texas Instruments, Broadcom and Samsung along with Apple’s A4 SoC in place of Samsung’s SoC. According to Chipworks, the A4 chip has three layers two of RAM and a microprocessor layer that features ARM Cortex A8 processor and PowerVR SGX 535 GPU. This shows that Apple hasn’t gone with more exotic Cortex A9 processor and PowerVR SGX545 GPU. We have added a video posted by Gigaom showing various internal parts of Apple iPad.