I went round and round.
I spent an evening taking different Ti pot and pan kits out of their boxes and comparing them at the REI flagship store in Seattle. I compared similar items in their brand and snow peaks. Much of the stuff I saw seemed like it was from a little girls play kitchen set. The 1400 is a great sized cook set. I finally ended up with the 1400 and then nesting the 900 inside of that, then I nested my Optimus Crux and a fuel canister inside of that. I like to fondue out in the snow when we ski or snowshoe. Both of those sets work great as a double boiler. I am very impressed with the quality of all Snow Peak products.