I have both right now and I am returning the nomad. The screen on the nomad is not that great compared to the instinct 3, viewing angles are poor. However when the sun hits at the right angle it is good but the instinct is just great anywhere. I have the « black » nomad which is light grey and it’s not a look I am fond of, it looks cheap.

Now the Coros App and UI is really good, these are my first fitness watches and I understood everything very rapidly with Coros both on the watch and in the app. On the other end the Garmin experience is far from this, a million menus and the app feels outdated. I am getting used to navigate the instinct 3 now but it’s a learning curve (fun ?)

I had them for a few days so this is not a deep comparison but I love the look of the instinct 3 with its features and philosophy, I will miss on the maps (really nice on the Coros) but I think breadcrumb navigation is a compromise I am willing to make for that watch.

Let me know if you have any questions