A local Advance here always has at least one and usually two counter jockeys working that are fluent in Spanish. They are making a killing, nobody else nearby seems to have figured it out.
Seeing one STP made by Champ and one offshored, 'could be' newer stock versus older. The pics of WM stock boxes don't add any info to topic query. As noted, locally all STP OF tiers back to Champ Labs US made.