There's a big difference in rendering-time, it seems the DataView is almost 50% faster.
In test-case 1 both sub-views are DataViews, in case 2 both are Lists.
Tapping an item in SubView1 pushes the new View with a card-slide animation.
I compared the app wrapped in PhoneGap on a Samsung Galaxy S3 and S2.
The S3 with the Lists is way slower to switch views than the S2 with the DataViews.
List-components apparently make your app feel much heavier, this was a dealbreaker with a client and I had a hard time finding out that Lists are slower than DataViews.