Hi,
I bought all the above apps premium versions.
Each app has its own unique features.
Like r.485 has public transport or color notes or data field builder.
RH-Sports is more technically and connects tru (whats that name of that website again? ), so you actually pay twice 
Komoot is very easy in use and intuitively, it has spoken navigation turns (on phone, not watch), rebuilds your route when you want to go a different path and even builds a route if you start from another starting point. You can import GPX files, even from wikiloc (another app) and you can invite and share with friends. Very, very detailed maps!
I tested all three of them and decided for Komoot (I have no strings with the company).
Curious about all your findings!
C__B