Balanced - This test is balanced between different areas of the language and different types of code. It's not all math, all string processing, or all timing simple loops. In addition to having tests in many categories, the individual tests were balanced to take similar amounts of time on currently shipping versions of popular browsers.
Statistically Sound - One of the challenges of benchmarking is knowing how much noise you have in your measurements. This benchmark runs each test multiple times and determines an error range (technically, a 95% confidence interval). In addition, in comparison mode it tells you if you have enough data to determine if the difference is statistically significant.
The Galaxy Note II's combination of Jelly Bean and a fast Quad-Core SoC put up the best Sunspider score we've seen from an Android device as well. The iPhone 5 and Nokia Lumia 920 (Windows Phone) had previously held the top spots in this benchmark on mobile device, but not anymore.
The Samsung Galaxy S 4 put up an excellent score in Rightware's Browsermark too. The iPhone 5 blew everything out of the water upon its release last year, but the Samsung Galaxy S 4 was able to overtake the iPhone 5 and outpace every other smartphone we have tested, with the exception of the LG Optimus G.
We should point out that we tested the S 4 with its stock browser and with Google Chrome, but have reported the score with the stock browser here, since it offered higher performance.