It's comparing their CL seasons analytics, Mudryk this year, Antony last year. The guy running the analytics account is an arsenal fan. He doesn't rate Mudryk much and had people asking for the comparison.
Antony beats Mudryk in every aspect basically, it is percentile rank in the CL games out of all CL players that season. The slices for the goals seem to be glitched though, (npxG is non penalty expected goals), and Antony should be below Mudryk for non pen goals but above for the xG. It's saying that Mudryk is a bit underwhelming and had a hot finishing run in the CL groups this year and that's about it, whereas Antony genuinely looked like an elite player in the CL groups.