I think it was the re-master, hadn't heard about 45.

No, you don't get it. The Metal Box vinyl release is cut at 45rpm on 12" discs. The higher playback speed produces better sound quality.

The Second Edition vinyl release is on 12" discs that play back at the customary 33rpm.

There is a difference in sound quality because of the difference in playback speeds.

Nooo! I'm not talking about the vinyl. Ok, there is the original 45rpm 12" vinyl, which is often thought to be the best. They we re-issued, yes. BUT also re-issued was the cd, a digital re-master, also in the metal box.

Okay, then. The reissued LP is also cut on 45rpm. It sounds very good.