"Tells a story" != "Tells the whole story", but I enjoy a little dive into the stats...
We'll keep the comparison to just Bayern and Arsenal.
| Avg. Possession | SCA allowed/90' | xGA/90' | npxGA/90' | GA/90' |
Bayern | 70.7% | 8.68 | 0.58 | 0.50 | 0.84 |
Arsenal | 55.2% | 18.65 | 0.89 | 0.82 | 0.91 |
For simplicity's sake, I'm just sticking to 90 minutes.
Bayern's opponents hold the ball, on average, ~26 minutes. Arsenal's, on average, hold it for ~40 minutes. So, we can then say that Bayern allow 1 SCA allowed for about every 3 minutes of opposition possession. Arsenal allow 1 SCA for about every 2 minutes of opposition possession.
All stats per fbref, and by extension Opta.