Ingredients
The website shows all ingredients used; to be quite honest, they're almost identical to my recent favorite, Ecover Sunny Day Liquid. Unfortunately the latter I first saw at TJ Maxx after it was already discontinued.
Back to Persil though, the german Universal version contains:
5 %: soap, Phosphates, 5-15%: non-ionic surfactants, 15-30%: ionic surfactants
Also: optical brighteners, enzymes, and a full essay of fragrance additives (Alpha-Isomethyl Ionone, Amyl cinnamal, Benzyl salicylate, Butylphenyl Methylpropional, Eugenol, Hexyl cinnamal, Limonene, Linalool, Geraniol
Since the website won't let me copy the ingredients being an image, I'll just say the american formula adds propylene glycol, EDTA, borax, alcohol, some silicones, pH buffer and blue dyes, while subtracting OBAs and phosphates. Fragrance is listed as fragrance, nobody knows what is actually used. Germans don't list actual surfactants, so hard to compare too.
However, it clearly is not the same formula by any means.