Use statistic.
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.
Both are average players if you ask me, Hojlund has played almost 100 matches and hasn't yet scored up to 30 goals and Zirkzee has played almost 50 matches with less than 10 goals to his name for the club. Both of them combined has played almost 150 matches and scored not up to 40 goals, that's a very poor statistics. As for Mount, I don't even know the problem of Amorim, Mount should be dashed out for free.