I'm looking into getting rear splash guards for my A-Spec (I don't believe front splash guards are available because of the side underbody spoiler)

However, I'm noticing a minor variation in the part numbers. For the 2018 A-Spec, the part number is 08P09-TZ3-210B (for crystal black pearl). Yet for the 2015-2017 models, the part number is 08P09-TZ3-210 (excludes the "B" at the end).

I'm wondering if there Acura made any minor changes or whether it is the same part relabeled.