Q's about rear suspension setup on my r32 GTST

[Pekatu]

I am currently looking at upgrading the suspension on my 1992 r32 GTS-t and after looking at afew pics, noticed that all the suspension advertised had different bottom mounts for the rear suspension all were different to my setup, all the GTS-t suspension i saw had "eyelet" mounts, where as my rear lower mounts are like a inverted U mount.

So i had a look around and discovered that my rear suspension is the same as GTS4 and GTR style.

WHY is this, i am confused!!!!!!!