Is the iPad 2 charger the same as the charger for the original iPhone?

My understanding is that the charger that comes with the iPad 2 is more powerful and will charge the iPad 2 more quickly than will the charger that comes with the iPhone 4. However, the iPad 2 charger is the same shape as the charger that came with the original iPhone. Does anyone know whether the iPad 2 charger and the original iPhone charger are identical in function? (BTW, my understanding is that the iPad 2 charger will not charge the iPhone 4 faster than that phone's charger will).

No, they're not the same. I compared mine awhile back and while they're the same shape, the iPad 2 one has writing on it that says "10 W USB Adapter". The one for the original iPhone doesn't have that writing, but if you compare the detailed input-output information, it does show that it is less powerful.
I believe that's why Apple changed to the two different sizes, so you can quickly determine which are for "phone" type devices and which are for "larger" type devices.
iPod USB Power Adapter
Input 100-240V ~ 0.15A (0,15A) 50-60 Hz Output 5V ----- 1A
10W USB Power Adapter
Input 100-240V ~ 0.45A (0,45A) 50-60 Hz Output 5.1V ----- 2.1A

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