Inertia (and Benelle is the top of the heap) do not use a gas system to operate the action - it is more like a pistol's "blowback" design in simplest terms, which means it does not use the weight of a gas system or the pulse reduction of one to lessen recoil. The added weight of the gas system reduces actual recoil, the operation of the gas system reduces the perceived recoil (AKA "kick").
The inertia therefore has no ports to foul up or keep clean.
Whether the reduction in recoil from the gas system is of importance to you can be determined by firing the exact same shells through both guns in one session and determining which you like better
It's a tough choice, but someone has to make it!..Good luck.....