Here are some initial testing results and thoughts during those tests:

Bantam: Very nice stove. Easy to prime(alcohol works better, less soot) and weights just shy of 10oz. without the windscreen. It burns hot and boil time for 1L of water was 4:34 in my test setup (which is a Evernew 1.3L Ti pot, ~20°C water, and tested to 100°C). Simmer control is good, but seems to surge when turned down really low so definitely not classified as "excellent" simmer control. It's "power" seems to drop off after 1L size tasks. I tried a 2L boil in a larger SS pot and boil time was 7:53. Still not bad at all.

Vesta: Nice canister stove and super easy to setup and get going. It weighted 8.8oz in the stuff sack without the windscreen (which it didn't come with). Boil time for 1L was okay at 4:51 but boil time really fell off in the 2L test at 10:57, so I don't think this stove would be any good at all at altitude trying to melt snow. Simmer control was super, as expected from a canister stove, being able to be turned down to a mere whisper and hold the output steady. This would be a good summer / warm weather backpacking stove which I believe is the target market Brunton was aiming for. I'd consider my Crux Lite best for that, but the Vesta would excel at larger pots/actual cooking because of it's better pot support, larger flame spread and overall better stability. Some features that might improve cold weather performance is the preheat tube. I was able to invert the canister on the flat valve body and it still burned well only slightly sputtering on occasion.

As an aside, my modified Vapor AF fared the best for boil times, simmer control, and power to handle larger tasks. The 2L boil time was excellent at 5:30 (1L test just prior was 3:20 to a full rolling boil). A bit heavier, but as I've said before, anyone looking for a stove that will burn anything, crank out the power, and be able to simmer superbly, I'd recommend a Vapor and bore out the jet.

I hope this information helps those searching when trying to decide on a stove.

P.S. - I don't know if there is a swap option available here, like in some of the flashlight forms I've belonged to, but I'd be interested in sending out the few stoves I have and/or receiving other stoves to test, so if anyone has a stove they don't use anymore or wouldn't mind sending a stove my way to test I'd like to do so. I of course would send it back (and expect mine to be returned) for an opportunity to try other stoves hands on.