Well, I did something stupid and bought them both.

Initial thoughts, both are VERY well made and I think I'll end up using the canister version the most with the liquid fuel version more in the winter. The Vesta is very light with a long flexible line and is super easy to setup and use. IMHO it will be hard to beat the Vesta for ease of use and since it has a preheat tube you can invert the canister and still seems to function very well. The Bantam has a much shorter tube but the valve control is much more precise than most I've seen or used. I'll be doing some boil tests and ease of prime / general usability test over the next several days and will post my thoughts.