I think Fernandez is playing well enough to win this title - she's certainly beaten far more decorated opponents. Having said that, she's played what, 4x 3-set matches in a row now? At what point does fatigue come into this?
Raducanu hasn't had to play such established names in the game, but her last 2 versus Bencic and Sakkari have been particularly impressive. 9 straight sets wins in a row now and for me, I think the win over Bencic has convinced me that she's the favourite.
Additionally, both players have been the underdog by ranking in all of their recent matches. This match changes things. It changes the dynamic and potentially their mindsets. I wonder if this is where the pressure comes in for one of them? Possibly this pressure and fatigue may be Fernandez' undoing. Equally, maybe this is the part where Raducanu feels the heat? She did play a final the other week, and Fernandez won a title earlier this year, but this is a major final, so a completely different proposition.