You will not get an answer that is worth anything...to you. The reason is that the answer varies too much.
I've gotten as little as 25 miles out of a tank of fuel.
I've gotten as much as 80+ miles out of a tank of fuel.
The first was at sea level (jetted to suit) on the sand with a paddle tire.
The second was at 4000'el., 80º (jetted to suit) in the mountains on a lot of shared use road.
This also will get you hugely varied opinion...but what are your reasons for buying a 220? You have researched the differences between the 200/220 and do have reasons I presume?
I'm not hawking the 200...as long as you know what you're buying and why, that's fine. If you don't know why...you should.