Surprise: the iPad 2 running iOS 4.3 is faster than the original iPad running iOS 4.2. According to CNET UK
Indeed, Apple itself promotes
Incidentally, when you compare the iPad to the other devices we tested, Android phones and tablets don’t come out particularly well. The Galaxy Tab is more than 3x slower than the iPad 2 in this test, and about 2x slower than the original iPad with the new software. The Google Nexus S smart phone doesn’t fare too well either, at nearly 3x slower than the iPad 2. There’s really good news for iPhone 4 owners out there: when it arrives, iOS 4.3 will deliver a 2.5x speed increase in this test.
The one device we’d like to test, but can’t, is the Motorola Xoom. This tablet has a dual-core processor and runs the latest version of Android, 3.0 Honeycomb.
We will get our iPad 2′s next week and we’ll make sure to run some tests as well to see how the new tablet is really faster than other devices with iOS 4.3 and the iPad 1.