Yes, I mixed up the terms and as a consequence the appropriate context. The Flagliano strap is definitely limited production...
The Cermet is a patterned leather correct? But on your pics it looks like it has undergone some process to change its texture.

It looks like the Extreme strap is a composite.
Here is a picture of its cross section:

So it looks like the leather is being wrapped around on three surfaces and somehow the two materials are fused and the leather qualities improved.
Cheers, Mike