Soud applications Reference line stage vs line sta


I am looking for a power conditioner, and people seem to like Sound Applications Line Stage.

I just saw two postings for SA line stage. However, they are "Line Stage" and "Reference Line Stage", and they looks exactly the same from outside (except for printing). Is there any difference between them?

Thanks,
Richard
indra986353
The problem is you don't know what version you are getting in the used market! Which makes even the newer pricier version not worth as much.
Thanks for all your responses.

A few local audio dealers recommended PS Audio regenerators (non of them sells PS products) given that I am living in an old apartment, so I am leaning that way for the moment.
I get mine from the local dealer so there is at least some form of providence. FWIW, very few people I know sell their Sound Applications unless it's to trade up.