Q: What does 4-way adjustable actually give me over a 2-way?

Four-way means you tune high-speed and low-speed compression and rebound separately, so you can control how the damper reacts to sharp hits versus slow body motions independently. A 2-way splits compression and rebound but not by speed. For expert drivers chasing the last bit of grip and platform control, that extra granularity is the difference. Enthusiast drivers benefit too, because the range was validated over the Ring’s huge variety of surfaces.