OK, so I got myself down to the Polish-Mexican-focused supermarket and found three different versions of Maggi sauce there: one made in China, one made in Mexico, and one in Poland. Since I have the Polish one, I bought the Maggi Jugo (Mexican) and the Maggi Seasoning (China.)
They are certainly different. Maggi Jugo just has two ingredients: Hydrolized Soy Protein and Caramel Color. If you’ve ever had Bragg’s Liquid Aminos, this is what it reminds me of, but saltier and a bit thicker. Or maybe a bit like Marmite in liquid form, though it’s not made from yeast extract. It’s the darkest and thickest of the Maggis (but still plenty liquid.)
The Chinese version is thinner, like the Polish version. Its ingredients are: Water, iodized salt, wheat gluten, roasted wheat flour, less than 2% of: sugar, caramel color, acetic acid, wheat bran, artificial flavor, disodium guanylate, disodium inosinate, dextrose. This one is somewhat more soy-sauce-y (maybe from the wheat), but not quite as rich, and with a detectable his of sourness to it.
The Polish one is: water, salt, flavor enhancers (monosodium glutamate, disodium ribonucleotides). vinegar, lovage extract, glucose, yeast extract, aroma. This one tastes more well-rounded to me than the Chinese one, which leaves more of an odd sour taste in my mouth. They both have acetic acid/vinegar, but the Polish one doesn’t leave me with as much an aftertaste. It also has the distinct lovage flavor to it which the others two don’t.
Despite being the most straight-forward one, the Maggi Jugo (Mexico) does have a lot of depth of flavor to it and would probably work best as an all-purpose umami booster. Obviously, I love the Polish one, as I grew up with it (and it is probably closest to the Swiss and German versions of it). And the Asian one is an interesting one, though tasting it on its own, it was my least favorite. But it’s not fair to really judge them on their own, as they should be used in conjunction with foods. In the context of a dish, I think the flavors would balance out.
Incidentally, they only had one Polish one left, so I bought it for safekeeping. In case you can’t find any, as I said above, this one has your name on it should you want it.