Sorry, I may have misunderstood how the MBA defaults work. I thought they dumped their RAM sooner than the MBPs to same battery power at the cost of slower wake-up. So, you are saying that 1-3 are the same and that the Air is only faster with 4?
1 and 3 are the same. The Pro would be about 2-3 seconds faster in scenario 2, and the Air would be about 5-10 seconds faster in scenario 4.