In a comparison between Lukaku and Osimhen, I would definitely put Osimhen ahead considering recent performances. However, Osimhen's wages are higher than Lukaku's. However, we have seen better performances from Osimhen in the last two seasons. But Lukaku hasn't done so well in the last few seasons.
Osimhen is younger than Lukaku and has reasonable better performances than Lukaku. Their ages make big differences between two strikers but in the last season, is it true to say Osimhen played better than Lukaku?
https://www.transfermarkt.com/victor-osimhen/leistungsdatendetails/spieler/401923https://www.transfermarkt.com/romelu-lukaku/leistungsdatendetails/spieler/96341You can see their stats, Osimhen scored 17 goals for Napoli and Lukaku scored 21 goals for Roma in 2023 - 2024 season. Who is the better player, just in the last season?
But since Conte likes Lukaku, keeping Lukaku in the squad is probably a good decision for the Napoli management. However, if Osimhen and Lukaku were at the same time in Napoli's attack, Napoli would have been stronger. But Conte is not interested in Osimhen. However, expect to see a better performance from Lukaku. But it is not certain whether he will succeed.
Lukaku can help Napoli to have a temporary replacement for Osimhen and he can bring many things, goals, assists and create space for his team mates too. Lukaku has very strong mentality that can be helpful in motivation on his team mates. I believe that Napoli has nearly no regret to let Osimhen leaving because they find a very good replacement, Lukaku.