I feel ya, I prefer Steam since it can more easily track my play-time and achievements. However, I've decided that I can't possibly wait any longer for Evermore, and I want to support these amazing dev's and I have the money to do so, so I'm going to buy the itch version ASAP, and then I'll buy the Steam version once it's available and I'll play that version going forward :)
I paid/donated $21USD for Cinderella Phenomenon after I played it for free on Steam since it was such a great game, and buying Evermore twice will cost around the same amount, so it makes logical sense in my mind (even though Evermore will be shorter).
Anyhoo, I wish thee luck in coming to your own decision! :)