Pellegrini is having more involvement across the final third. But crucially, look at area near the corner flag at the bottom right.

Pellegrini is getting into that position more than Ozil, ready to fire on his right foot.

Pepe likes to cut inside like B. Silva is doing here. Ozil is likely to hold position so he can swing balls on his left foot where KDB starts here. Congesting the left channel. No RB is overlapping per the inverted rule.

You can see here that Pellegrini has more involvement on the right side between the corner flag and the area.

He hits 2.2 successful crosses per 90. At 36% success rate. Similar no of crosses to KDB. Almost 10% greater accuracy hower.