Vince, after I saw your version of Paulaner Oktoberfest, I did some online research to see if I could find out what's going on. When I originally bought, and especially when I poured, my Paulaner Wiesn, I wondered if it was a wheat beer (which I typically don't like very much). But I verified that "wheat" in German is "Weizen", not "Wiesn", although I couldn't get my online translator to recognize "Wiesn". But "Wiese" is "meadow" and it turns out that the locals around Munich call the Oktoberfest festivities, and the grounds where they're held, "Wiesn", a colloquial contraction of the German for "Therese's Meadow", Therese being the princess who married Crown Prince Leopold in 1810, kicking off the first Oktoberfest.
And this webpage
https://www.foodandwine.com/articles/what-heck-oktoberfest-beer claims that the Oktoberfest beer in Munich has been getting progressively lighter in color with time, but Americans still like the older amber Märzen style. So some German brewers make the lighter-colored version for consumption at the Munich festival, but brew a marzen style to export to America. After finding Paulaner's website and reading what they wrote about Wiesn and Märzen, I think that Wiesn is their Munich brand and Marzen is their American export.
You're right, I generally like the amber Oktoberfest styles (from American brewers like Sam Adams, Sierra Nevada, Bell's, Leinenkugel, and Atwater) better than the "golden" styles (German imports like Paulaner Wiesn, Weihenstephaner, Warsteiner, and Hacker-Pschorr - listed from lightest to darkest in my experience) I've been trying.
FWIW, the Paulaner Wiesn IS made with barley malt, both light and dark varieties.
All pretty interesting to me, and although I have my preferences among these Oktoberfest beers, they're all quite good compared to typical American lagers, IMHO!
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- GT