Goals Assists isn't necessarily the best way to compare players.
Olise has better statistics in Goals Per 90 Assists Per 90 than Yamal.
Yamal has an 85.9% short passing percentage, Olise has 92.2%. Yamal has a 73.3% medium passing percentage Olise has 83.3%. Yamal has a 45% long passing percentage, Olise has a 45.5%.
Despite Yamal playing four games more, Yamal had 246 shot creating actions, Olise had 235. Yamal averaged 5.65 shot creating actions per 90, Olise averaged 6.29.
Olise had more blocks and a better tackling percentage. Yamal had 134 mis-controls, Olise had 81. Yamal was dispossessed 73 times, Olise was dispossessed 46 times. Yamal had 3.85 successful ball recoveries per 90, Olise had 4.04.
In terms of all around play including offensive and defensive contributions, Olise is clear of Yamal.
The ONLY thing that Barcelona fans can point to is he dribbles well and is 17. Stats don't lie.
Questions need to be asked...