The gas-air mixture has a greater resistance, which means that multi-electrode plugs have greater resistance to the flowing current, therefore LPG plugs have a smaller break. The ground electrode is arranged differently than in multi-electrode candles, which shields the spark from the sudden movement of the mixture in the cylinder.
So much for theory.
Take "24". I have the same engine and I run it for 6 years on these plugs and it's ok, no misfiring or shifting at idle.
You do not need to change the gasket in the middle of the collector, it has never happened to me to get damaged. You can damage the ignition wires sooner because there is uninteresting access, and if someone else gave a gas nozzle on the manifold from the side of the wires, you can get tired a little.
LPG candles wear out faster and multi-electrode plugs last longer.