You're confusing PE to J. OS has a beautiful PE cabin.
I flew OS J a few times already, (Many more times than I flew in J)..
Usually Y is 2-3-2, PE is 2-2-2 and J is 1-2-1.
The flight i'm referring to was Y 3-4-3, PE 2-4-2, and J either 2-2-2 or 2-3-2 I don't remember