The best part about Granlund is how he plays with heart in his sleeve. In addition to the skill and vision of course. He battles so hard and plays an intense game. When the team is really struggling and desperate to get things going or in a high stakes situation, he wills his line into scoring chances despite his size. Just one of the hardest battlers and fiercest competitors I've ever seen. I really like those type of players. They play the 'right way'.
Fiala might have more natural talent, but from what I've seen, he's a soft-ish dipsy-doodling giveaway machine. Kinda opposite from Granlund. I really dislike those type of players.
In terms of production I feel like his ceiling is where Granlund is now, but if he gets there he does it in a worse way. Less battling, more finesse. More annoying way. More soft way. And yeah, that's his ceiling, so he's unlikely to get there.
I get that the age and contract situation here is in Wild's favor, but it's still a horrid trade. Wild are just hemorrhaging value.