I have the koda gas one, makes fantastic pizza. Cant say I know what gas takes like and I work in the gas industry. Never had any complaints of off flavours in food I've served from either the pizza oven or gas BBQ. It's quick to get to temp. Gives a really good crisp base.
I looked at the brewtools 80 but it looked too much of a faff , too many recommended extra valves etc. I wanted a simplified setup not a more over complicated one.
Clearing some items I no longer use. An 80 bottle tree and bottle washer with 2 hand cappers and caps (not sure how many are in the bag) £10 plus postage or collection from Bolton (Greater Manchester) or Barnsley
Daz