Trouble is everyone absorbs it so differently ie there is great variability so that the info on equivalents is very approximate and also with gel especially it does depend on so many factors like your skin thickness, where on the body you apply it, how hairy, how sticky, how wet, how dry, what products you put on it, the temperature of your skin, time of day, area of skin you spread it on.....!!
re the different caps - companies are always changing the packaging of stuff - everything from shampoo to washing up liquid, tablets, breakfast cereals etc. It doesn't mean the product has changed. The amount dispensed by a pump - if it says it's the same dose and amount then it is (give or take the most minscule amount that would be undetectable). Last time I wrote to them - Besins (maybe 18 months ago) they hadn't changed the formulation for years. The inner packaging is a sealed pouch and I imagine it's just the outer packaging that changes - even if the inner pouch changed the gel I presume would stay the same?
If you want to write just to check they haven't changed the formulation along with the cap then do go ahead and report back - I'm done with that! Also don't forget that it is produced in different outer packs for different EU countries and even called something different....
Hurdity x
PS just seen your post Mis71 mum - oestrodose is oestrogel so whatever it says it is 0.06 % gel produced by Besins - then that's what it will be? in UK = oestrogel. See above the amount dispensed should be calibrated to be the same....that's what they told me - it;s all tested for compliance