Yes I have. In fact it was I compared the picture with both girls (Elsa and her sister). It match one of them quite well.
Well, it's time for a seriuos talk not about "match quite well" . I guess you compared faces/features and tried to find a similarity. If desired one can find a similarity even between very different faces (for example Julia Roberts is actually Jennifer Lopes, eh?).
Did you look at the hair-styles, at the girls dresses? I mean Beatrice she is definitely a teenager of 14-16 years old in the picture, she was born in 1884, her hair-style and dress is around the 1897-1899 years. Elsa and her twin Olga were born in 1876, and in 1896 they looked as here's :

In 1897-1898 as here's

In 1897-1898 both Elsa and Olga married, they looked like young women but not like the teenagers - Beatrice and her friend.
So I don't believe that's Elsa with Beatrice there.