I don't know how a zipp super 9 tests compared to the 900, but a super 9 and a stinger are very similar aerodynamically. In the assumption that the super 9 is faster than the 900, you could then say that the stinger is superior to the 900

Zipp tested the 900 vs the sub and super 9 and found a 2 watt difference at 10 degree yaw. I think this was in a P3. Assuming the Stinger performs similarly, you might gain a watt or two.

The Stinger is pretty quiet for a disc wheel. The Stinger will also have a better vertical compliance (more comfortable, less fatigue) and be laterally stiffer (less chance of frame or brake rub and better cornering). It is really hard to beat the ride quality/performance of a spoked wheel.