My simple test:
Go to The Verge on the Air and the Air 2, and scroll up and down the page. The Air reloads the page as I move from top to bottom, and the Air 2 keeps the entire page loaded at all times. Also, the Air 2 loaded the page faster than the Air when they were launched simultaneously.
I notice no difference on my rmini or air2. Once the page was loaded on both. I could move from top to bottom as fast as I wanted as much as I wanted with no loading.