Here - 9to5mac:
https://9to5mac.com/2017/03/22/2017-ipad-vs-ipad-air-2/
https://9to5mac.com/2017/03/22/2017-ipad-vs-ipad-air-2/
In terms of the power you’ll find inside the new iPad, it’s a notable step up from the iPad Air 2 originally introduced in 2014. The new iPad is powered by Apple’s A9 processor clocked at 1.85GHz. That’s the same processor that’s found in the iPhone SE, though it’s closed at 1.8GHz there.