help with 2 part #'s S3 rear valance need clarification

[emeraldA3guy]

So i am trying to buy a S3 rear inner valance to finish off my car
I see 2 part #'s

8P4807434GRU

and

8P4807434G1RR

What is the difference between the GRU and G1RR?

this is for my sportback

 

[Ash187]

GRU is primed

Looking at the actual part number on ETKA you would want part 8P4 807 434 C

the 1R is listed as a remark for that bumper as Lava Grey