Hey gang-
For the record, I'm not a close-minded white-gas-only nut! Just trying to crunch numbers as objectively as possible.
I did start out comparing with the WhisperLite, because that's what the OP already owns. Rod suggested the SimmerLite later because of the lighter weight–and then intrigued me with the 2g prime!
For weight savings with larger fuel bottles, it depends on how much fuel you need to bring…
11oz bottle: ~90g
22oz bottle: ~135g
33oz bottle: ~195g
8oz isopro can: ~140g
If you needed 8 to 16oz of can. fuel, you'd have ~280g in empty can weight. Using a 22oz liquid fuel bottle for equivalent fuel would weigh 135g–105g lighter just in container weight.
Of course, the rules all change when you have a custom stove! I dunno. The remote canister I'm working on I think will come in around 5 ounces versus 8.5 ounces for a stock SimmerLite… With the calc in the above paragraph, that 105g (3.7oz) in container would bring weights about even. Which brings us back to fuel efficiency. And I've got nothin' on that! With all the experience and data Roger and everyone else has on this site, it sounds like remote canisters will still end up the most fuel efficient and lightest. Interesting intellectual exercise, though. I'm enough of a geek that I think I'll buy both a SimmerLite and Windpro, sacrifice my back and run them side-by-side through some trips this winter. Why not!?
Cheers-