cztexas

My GL got vandalized, need to replace two door windows. The front one is safty glass, the criminal tried two hits but could only make it cracked. So they broke my rear one.
Anyway, can anyone help me to find the difference between these tow glasses: 1647200620 and 1647200820?
I got 0620 from my dealer via last 8 numbers of my VIN. But insurance body shop wants to use 0820, and they insisited 0620 is wrong glass for me.
I tried to google it, but seems they are both suitable. I am totally confused .
Thank you!!

gl450x164

Part was just superceded