I would say iOS and Android.

Originally they were pretty different in terms of functionality and appearance. Android has improved a lot in terms of the user experience and UI, but also has become more locked down and user hostile. I would say that iOS has actually gotten worse in terms of bugs/reliability, and now Apple is relying on services and ads for new revenue. The user experience has suffered.

If you want a mobile phone/OS that respects user freedoms, agency and privacy, there is no consumer option. Both are filled with spyware/data collection from both the OS vendor and third party apps.

I wonder if they will implement the same malicious compliance as they did in the EU with the junk core technology fees and notarization requirements.