IMO, the whole Barbera by Attolini line was constructed by some ebay retailers to drum up enthusiasm for their product. I am almost 100% sure that they were never made to the standard of the Attolini main line
I was almost certainly the first ebay seller to point out in my auctions that SOME of the Barbera Sartoriale coats were most definately made in the same factory as the Attolini Sartorio line, and to the same spec. Additionally, the evidence seeme to point to the Sartoria Attolini's being made there as well, ie it was the Attolini factory. I did not however, at that time or at any time after, say that the Barbera Sartoriale suits were on par with Sartoria Attolini, because they are not. The differences are not so great, but there are differences. Unfortunately, as always seems to happen, everybody and their brother copied my auctions. That was not such a big deal, but it was a big deal that many sellers started to claim that every Barbera coat they have is Attolini made, (most of which are not.) Further they like to claim that Barbera Sartoriale = Sartoria or Cesare Attolini, which it does not, So buyer beware.
I added the Barbera/Attolini connection info to auctions for Barbera/Attolini coats because it was true and relevant. I do not however feel that there is a big difference in quality with those coats, In fact I think that the quality of the Barbera Sartoriale line has stayed at a consistent level (excellent) throughout the manfacturer changes. The strength of the Barbera line is not just construction quality or maker. It is fabric selection and styling, which is IMO at the very highest level among RTW brands.
There IS a reason to differentiate between manufacturers of the line though, and that is cut. The cut has varied greatly over the past few years, usually corresponding to a change in maker. Some fit me much better than others, and I'm sure I'm not the only one that holds true for. Which you willl like depends on your fitting requirements.
Honestly, I am not even a fan of the Barbera Sartoriale line as I think it is lacking versus it's peers and it's main selling point is the Carlo Barbera fabric.
Honestly I disagree. I think Barbera stands head and shoulders above its' peers.