As far as which scale models, I do 1/35 armor, as well as 1/32 and 1/48 aircraft, and do a lot of pre and post shading as well as free hand camo and mottling etc, so having something with a bit more precision and control is what I'm after - especially for German camo on 1/48 kits.
I'm late to this, but as a scale modeler who owns several airbrushes: the Eclipse would be the better option for what you do.
The thing about Microns is they're fussier than the Eclipses. They're much picker about paint type/brand and reduction, and less simple to maintain. All parts for it are much more expensive too, so there's a certain pressure to be more precious with it. The Eclipse line (including the Takumi) is super versitile and super forgiving, while also being super capable. A micron has higher detail ability, but that comes at the cost of being more dificult to learn on, and much more picky about paint types/brands and thinning ratios.
They do have a better upper-end for precision and finer atomization, that's definitely true, but they also have a higher low end for dealing with thicker paints and/or paints with larger pigments.
It's a beautiful piece of kit, but for a modeller its NOT a liner upgrade: it's a more specialized side-grade.
The Eclipse is also already so well capable in terms of precision and atomization that the threshold for when/where the benefits of a Micron really come into play is much higher than you'd think. A micron's level of precision doesn't actually become needed unless you're looking to do extensive fine freehand work on figures. Like if you're looking to do high-level realism with facial skin tones, or are looking to do advanced freehand shading on small figures, that sort of thing.
If you're wanting to do "golden demon" level gaming mini paint schemes with just an airbrush, or you're trying to freehand a Steve Wang or Sceamin' Mad George style movie monsters at scale, those are the sorts of jobs you'd want/need a Micron for. Freehand camo or shading on aircraft or tanks won't even approach the limits of an Eclipse. For those jobs the only difference will be that the Micron will be fussier.
I have an Eclipse (CS) and a Micron (SB-V2), an HP-TH, a Paasche VL and H, and a Badger SOTAR. The Micron and the SOTAR are hanger queens 99% of time. The Eclipse is my "does nearly everything" workhorse, the Paasches are relateve trash, and the TH is overspecialized in the opposite direction to the micron (only useful for really big stuff). The Micron's relative practical disadvantages mean it's not worth using unless I really need it's special abilities.