Wow, a very nice comparison here. You’re lucky to have this old version back from the early years of the brewery! The beer sounds like a killer one!
Indeed, it’s very difficult to have different beer every time and yet stay profitable. I can see it here in Bulgarian breweries too. But the key is, maybe, to have a portfolio of couple of beers that are brewed regularly and on the other hand have some seasonal ones that are a bit different every year.
Cheers!