JavaScript Benchmark test: iPad 2 - iPad - iPhone 4 - Galaxy Tab - Nexus S
CNET.co.uk did some SunSpider Javascript benchmarks on the new iPad running iOS 4.3 and compared them with other iOS devices and a few Androids. The results are pretty impressive.
iPhone 4 and iPad with iOS 4.2 are behind both Android devices, but significantly faster with iOS 4.3 that features new WebKit 2 browser engine.
As for iPad 2, it is more powerful, it is over 50% faster than the previous iPad.