Hi Sfifties
I cant help with the oestrogel except from what I gather, as it's made by Besins and has the same mixing compounds, and from how women report it on here, then it is like Testogel and as such is quick drying. Sandrena which I have used is completely different and is thicker and quite sticky - and similar to Testim gel which I have also used. It is rubbed in rather than spread and takes a while to dry.
In terms of equivalence - not sure how they will compare as they are different concentrstions and will be absorbed differently however exact dosage: 2 sachets of 1 mg Sandrena = 2 mg. 4 pumps of estrogel = 3 mg so to have exactly the same you would need 3 sachets. You may absorb the Sandrena better though as it's more concentrated and dries slower?
Sorry cant help with the Lenzetto but I would do a search as there are a few women who have tried/are using it.
Hope this helps a little
Good luck with whatever you choose!
Hurdity x