Højlund has 7 goals and 2 assists in 1480 minutes in Serie A.
Vlahovic has 8 goals and 2 assists in 1645 minutes in Serie A.
Not only has Vlahovic played more than Højlund, he is also on penalties and 2 of his goals are from the spot, while Højlund doesn't take them.
In addition to having a better striker instinct and being quicker than Vlahovic, he also has a higher non-penalty xG per 90 than Vlahovic, so how people are creaming themselves over an average striker at best, who is also 3 years older than Højlund, I have no idea. Vlahovic has never scored more than 15 open-play goals in a season, and remember, this is Serie A we're talking about, where the likes of Lukaku, Belotti (not lately) and Immobile are banging in goals. Don't know why people think Vlahovic is the answer to our problems.