Michael Pronay wrote:

Tank fermenter otoh - especially some sitting in German viticulral
schools - insist on the fact that both methods are absolutely
identical, that finally a tank is nothing else than a very, very
large bottle.

One thing that I've noticed, Michael (on a very tangential point) is
that larger format bottles of sparkling wine are often superior to the
same wine in smaller bottles. These of course are "Methode
Champenoise" or whatever it's now called, but I wonder if you've noticed
the same thing and have any explanation for the phenomenon.

Mark Lipton