Zirkzee, 49 matches, 7 goals = 14%
Hojlund, 95 matches, 26 goals = 27%
This mean Hojlund has almost double the chance to score a goal compared to Zirkzee.
If I'm the one who make decision, I want Hojlund to stay and sell Zirkzee. Amorim is joking he prefer Mount over both of them, Mount has 8% chance because he played for 48 matches and only score 4 goals.
Neither of them is good enough, and in a perfect scenario, both of them should leave the club, but if the club wants to keep one of them, then is agree, Hojlund should stay.
Since he won't be the starter in the team, it wouldn't hurt to have a backup striker. Sesko would be the starter.
I have my doubts about Amorim. He is good, but I don't think he's made for a club like United. I don't see any reason why Mount should be playing as a striker when he has Sesko on the bench. Luke Shaw has no business starting a game like that, too. Fenandes behind a natural striker like Sesko would be more productive.
In a club, they will have to consider the usefulness of a player to them, they cant be spending more on any player and be having lesser result from them, if they think the two players are both going to turned a liability to them by not delivering up to their expectations, then the better they let them both to go and get in new players more active and well performing, because are the end, everything will tell on the performance of a club.