What are the differences in Campagnolo chain rings?

[CC Rider]

I need a 39T chain ring on my late '80s/early '90s Record set up and assumed I'd be looking for a Record chain ring to keep things 'right'.
BUT .... I came across an article the other day that said that there are no differences in the inner chain rings across the Record, Chorus and Athena groupsets (assuming 5 hole, 135BCD).
Is this correct? If so, that's great as it opens up my opportunities. If not, what are the differences?
Thank you.

 

[mdvineng]

As long as the bcd is correct all good

 

[hamster]

The rings are all interchangeable, Athena and up all have the nice machined rings, lowlier groupsets have stamped rings. IIRC Record have a slightly better polish but its not really noticeable and TA rings are even better finished.

 

[Nob]

135BCD no issues but on a 144BCD you can only run a 41T ring as your smallest ring.

 

[CC Rider]

That's great news! Knowing that I'm looking for machined, not stamped, parts is really helpful.
Thank you all

 

[pigman]

Even the stamped ones that came with veloce et al work ok and have no noticeable dip in performance. They just look poorer