to Turbines. Turbines are a totally different sound. Very high pitched. Long rides will where you down without ear protection.
Piston engines are without a doubt louder up close aswell
as from a distance.
Videos will not record the frequency of the 26000 rpm turbine.
I would guess that the decibels created by a big block would
be physically worse.
Wearing ear protection takes the edge off the people on-board
telling you to slow down aswell.