SEASON PREMIERE: If you’ve just watched “Season 5” of this long-running, very popular baking competition series on PBS, you might be confused by the fact that a “Collection 5” pops up, just weeks later, on Netflix. But it’s two entirely different seasons – and, in some ways, different shows. The Season 5 just completing its U.S. run on public TV was a vintage season, never before televised in the States, featuring fan favorite judge Mary Berry, who was with The Great British Bake Off (its original U.K. title) from 2010 to 2016. But this new “Collection 5,” imported by Netflix, is a season of the show’s post-Berry incarnation, with Paul Hollywood as the major returning familiar face. Viewers in the U.K. have complained that the show has lost much of its charm without Berry – but U.S. Netflix viewers, beginning today, can decide for themselves.