I am sure that Stahlsturm will respond to your queries shortly. It is about midnight right now in Germany and unless he is a night owl we may not hear back for a while. You stated: “All that being said, and again, I'm nowhere near an expert, there does appear to be an Amber Marzen (that we, in the US call Oktoberfest) and a light Paler Marzen that some are calling the Wiesn. I would venture to say that these are two different types of beer styles and should be properly differentiated. Perhaps these are not the right terms, what would the right terms be?” I do not feel confident that I can guess what Stahlsturm’s answer will be but I would suggest that the beer categories of the European Beer Star Award (EBSA) are a likely choice. The amber beer would be called a Marzen and the golden colored beer would be a Festbier (what we Americans might call a Wiesn). As to whether the beer they serve at the various Southern Germany festivals (“There are festivals just like that all over Bayern from May to October") are consistent with the EBSA category for Festbier I personally have no idea. This is a topic that somebody else (Stahlsturm) needs to address. Prost!