Apologies if this question has been answered in the past. If so, would someone point me to the best way to search?

I'm on EK231 LAX-DXB on 02April17, Business Class. Emirates website seat diagram shows wing/fuselage intersection ending at row 18 or so, while Seatguru shows it at row 12. I like to look at the earth. How can I determine which diagram is correct?

Merci beaucoups