I believe FNA is trying to be more loyal to the original XNA while my monogame tends to introduce new features.
I've been happy with monogame when I used it in the past. I'm pretty sure Celeste was made with FNA
You might be mistaken, the Monogame Github README cites Celeste as an example made with it.
You might be mistaken, the Monogame Github README cites Celeste as an example made with it.