Here is the problem, if it is leather, its a natural product and its not all the same because the cow just can not do it and the tannery can't either. My Best guess, I am 99 % sure of it, its not leather at all.
There are different parts of the hide to pick from, it will tan different and soak up the dye different. Leather is a nightmare to deal with. I really doubt one would get into this mess when there is another way out.
The made made synthetics are much more durable and cheaper. And you have many different grades of them. There are gun holsters made of this material. It is backed by leather but the face is what we are talking about.Look over here
Skin Guard
Extreme Close Up Skin Guard
Skin Grain
Now we go trying to take care of it and pour chemicals on it like its leather and we all get different results. Why does one have good results and another have bad results. Some even have little use and are garage queens under ideal conditions.
Its what was used to make it. Different runs of material are never the same from lot to lot. And if they run out of one they just substitute another that looks like it. They cannot even tell you what it is and how to take care of it.
Look at my 2004 Dodge Ram, garage queen with 52,000 miles on it. The truck never seen the sun. It looks like it disintegrating!!! And I took care of it.
Now look at my 2008 Escalade with 90,000 miles on it. I did the seats 2 times I can remember. Used every day. The seat looks almost new.
Why would that be? Its the quality of the material used. They all come with different proprieties, abrasion Resistances etc etc. And I almost guarantee you its not leather. Its a leather like substance.