Maybe there are some explanations, I just don't know

Here is the story: first got a Cavalier henna swatch from HM (6"x6"), did a unscientific wearability test by rubbing it with a rather rough fabric till the top begins to show peeling. This Cavalier henna last at least 3x longer than 5 other leather swatches from costco and sam's (5 of them, 4 imported, 1 made in US, including Leather italia USA, Soflex, Quest, etc). so I'm so impressed with this town & country Henna hide based on this test.

now I got a document Saddle from HM, i run the same test under similar condition (how much force, speed), guess what: this document saddle is at most similar or even poor than some of the 5 swatches. I redid the test on Henna, confimed it does hold on 3x longer.

I can't understand why this Document saddle does so poorly in this test. Does the swatch reflect true sofa hide quality (except color, which may vary)? is it possible the Henna swatch was made in US and Saddle is in China? Or this Saddle is just a "bad" sample? I was about ready to order this hide, this really worry me a lot.

any thoughts? thank you