Factor in that afatter tyre rinning lower pressure will absorb a lot more shock than a skinny tire at high pressure... the skinny tyre will also contact the bump edge first and impart more shock as well as some steering torque.
There is a reason why mountain bikers don't use skinny tyres and why they often mount a wider tyre up front.
When you ride on the road or commute it is always about finding that tyre that gives you best balance of ride, handling, and speed and when you improve on one area, you often lose an another.