1st Choice = Wood
2nd Choice = Charcoal
3rd Choice = Oven/Stove (It is only gas cooking appliance in around, if you put a grill grate on the stove top, you would see very little difference between it and your outside gasser)
There is a HUGE, I repeat HUGE difference between gas & charcoal..even on high heat cooks with zero smoke.
and yes I have done side by side comparisons and I correctly picked a gas cooked steak from a charcoal cooked steak 5 out of 5 times.