Allusions in Art

I have been studying Pre-Raphaelite art recently and stumbled upon this picture called Lady Godiva by John Collier:

All of a sudden it reminded me of this painting by Kozma Petrov-Vodkin called Bathing the Red Horse:

I wouldn't dare call this plagiarism, which I'm sure it's not - but... isn't there a sort of an allusion to the Lady Godiva?