If you’re already using Debian on desktop, then Debian on a VPS makes sense from a maintenance perspective: you only have to track one set of security updates. When there’s suddenly a critical update for some vulnerability, you can update both at once because it’s the same upstream repos. Whereas with Ubuntu on your VPS, you’d have to be mindful to make sure to check back when the same vulnerability is patched there.

Do not underestimate the effort to upkeeping a server, and do try to unify your procedures so you’re spending less time doing the necessary things, and more time building up your self hosting stack.