30 Gallons is 110 litres, I’ve been seeing a large drum muncher only need around 40-50 litres per minute? I didn’t even know you could get a track loader that could produce 100+ litres per minute. I’ve got a lot to learn.
The rotary is cheaper but the processed material pieces are bigger and look less finished. The drum or forest mulcher produces finer material. The happy medium is a disc mulcher.
I prefer a heavy flail mower with hammers and recirculation bars/debris rakes. It is not a replacement when a forestry mulcher is actually needed though.