It's only 10% of difference.
Last season I played level 10 Cup with level 6 team.
69Q vs 49Q. 30 or 40% more or less. This is a great diference.
Theoretically, 10% difference is just as small as Level 1 Q16 team vs Q14 team. Team strength of 2 teams are very close. 40% difference is similar to Q18 team vs Q13. I consider Q18 team is clear favorite to win.