We just bought the Cone, Enew 1300 and kitchen (awesome).
It really does come down to what you are cooking. Using the KILLER potatoes/chicken/gravy/craisen dinner (freezerbagcooking), I needed 3 cups of water (said 2, but I think I used different spuds). And then had a cup left for 1 drink. Breakfast was the same, oatmeal (in freezer bags) and 2 cups coffee.
With the Caldera Cone, it is so darn simple to boil another pot it is amazing… since we have a toddler – being able to boil everything we need for food in one pass means it is simpler to me! Also- we did not get the non-stick (which I think is heavier). On my scale the Evernew 1300 is 4.93oz, and that is with handles/lid. No melting issues or anything like that.
I think, based on my tests, that boiling 1000 once is faster than 500 twice, based on the below data. (Caveat- in my tests I was trying to duplicate a "from scratch" boil, so prior to each test, I ensured that everything was completely cooled — so if you boiled 500ml and after using it, immediately added 500ml more it may cut time down. But the differences are still small, IMO.)
Also – I did find that having some extra space was nice when using it on slightly uneven ground and not having to filling "to the brim".
—testing
Locn: 5300' (my backyard); water= from fridge (cold); temp outside was 60?
I tested the stove pre-trip and boiled 500ml (2 cups) in 8m with 18-20ml of fuel. (first attempt using 15ml did not produce a boil).
I then tested 1000ml (4 cups) of water with 30ml (1 oz) of fuel and got fisheyes at 12m and boiling at 14m – out of fuel at 15-16m.
At camp (past weekend) – I needed 35ml to boil 1000ml – 7500'.
– Jake