StartOS is great. I ran it for a week, migrating from my Umbrel. I stopped not because it wasn't good, but because I realized I wouldn't be happy unless I built it myself. StartOS is more technical than Umbrel. I enjoy the very granular configuration options. Umbrel is more user friendly. With backups and https coming in 1.0 I don't know what arguments I'd have to choose StartOS. I'd have to run them both and do an update comparison.