If it is made by the same company with exactly the same concentration of estriol and the same ingredients, then it's the same product and shouldn't make any difference. Like I said the same thing happened with gynest cream/estriol 0.01 % - the actual tube was exactly the same too - just not called by the brand name any more.
I'm not au fait with how pharma works and I'm sure there will be something online - but I guess the company that first developes the product takes out a patent and after a certain number of years, the patent expires and then maybe other companies are allowed to produce it - but it seems weird that the same company just changes the name but produces the same product. I mean with Vagifem, it's still called Vagifem but the other company producing it called it Vagirux. Maybe the original company calls it by the generic name rather than a new brand name to ensure that's the one that will be used. What I'm confused about is that some generics are completely different from the original brand named one (because I think a generic just has to have the dose of the active ingredient the same - like with paracetamol etc), and some are exactly the same - like Vagirux and Vagifem (I think...). Probably something to do with monopolies??
Hurdity x