Are all RG6 alike?

I’ve noticed the three cables I have “feel” different.

The Antop cable is very rubbery, and bends quite easily.

The Dual cable is white, less of a rubbery feel, and quite a bit stiffer.

The Tri cable is black, feels more like a quality garden hose, and is much stiffer than either of the other two. This is the one that came with my current Verizon FIOS service.