I don't believe this is the case. I'm in Australia and the detergents for UP1 and UP2 are exactly the same. There is a difference between their UltraWhite and UltraColor powders and UltraColor liquid.

Here are the links to the ingredients for the UP1 and UP2

https://www.miele.de/pmedia/ZGP/data_sheet/100292125-000-00_UltraPhase1_185.pdf

https://www.miele.de/pmedia/ZGP/data_sheet/100246474-000-00_MieleDSPUltraPhase2_124V2.00_190213.pdf

How about the fragrance-free versions?

I have used the sensitive version and it has no fragrance. Here's the link to those:

https://www.miele.de/pmedia/ZGP/data_sheet/100245662-000-00_DSPUltraPhase1Sensitive163_V1.00.pdf

https://www.miele.de/pmedia/ZGP/data_sheet/100245663-000-00_DSPUltraPhase2Sensitive148_V1.00.pdf