Disc Rotors for a YETI Lawwill DH4 with the old Ringle hubs

[brakestuff]

Hi, can anyone know the exact sizes for the disc rotors (outer diameter, pitch diameter, etc.) for a YETI Lawwill DH4 with the old Ringle hubs say (front and back) to me?
What is the difference between 3-hole disc of Rock Shox and AMP Research?

Greetings
Torsten