I think a lot like the VIII over the XVI for 2 main reasons:
1) extra gas -- they're short-legged already, this helps a lot
2) ENY values -- more perks earned in the VIII, and it's available longer than the XVI when ENY kicks in.
Some say the wingtips help the 8 turn better. I think this is a placebo effect. The difference is very small between the two, and you're already in an uber spitfire. I've flown both, and to me the 16 seems more lethal, mostly because of higher speed, increased roll rate, and the 50cals (they're worth 6+ .303 guns, so you're gaining a good % of firepower by dropping the 4x.303s and adding the 2x.50s.)