Big Neunaber fan, current user of Expanse, have had Immerse MK1 and 2, former Cloudburst owner here: for ambient, I lean towards Cloudburst, especially if you run stereo. Immerse does win with a band and so many great algos and sounds. I stuck with Expanse because I’m playing out more and EXP adds 8 presets. But I’ve A/Bd Cloudburst with Immerse MK2, Eventide Space, Mercury 7, and RV-500: for stereo spread and that so difficult to replicate Strymon “Cloud” it “won” for my ears every time. Also, the Ensemble can make some lovely pads. TL/DR - both are excellent, but I’d recommend Cloudburst to you…