Given the price point of both films and how the dev times they have on their site is the same as Foma, I'm pretty sure it's repackaged Foma 100 & 400.
Like Patrick said, if it was rebadged Kodak it would be priced higher (a 100' roll alone for Double X on their website is ~$100, so UF's "version" would probably be low $90's).
A big maybe on it being Orwo, if they (Orwo) were getting clearing out old UN54 (100 iso) & UN74 (400 iso) stock they had way back in the freezer, though their 100' rolls for those films are ~$75. UN74 has been discontinued for a couple years by now (no longer showing on their NA website), and the UN54 is low in stock on their NA site.