@Michael, blimp is correct ("I expect Eiffel is talking about Lupus films.")
Some of the Lupus films -- though not all -- deal with precisely the same subjects as Menzel, and often with similar production values. There's a fondness for ragtime music, the avuncular headmaster, and a pretty deep awareness of the complexities of the nation's communist history.
I'd put a film like "Stalin" well beyond the ambition, not to say capacities, of most erotic film makers.
I don't say that Menzel is responsible for these, but perhaps someone who worked with him, or was inspired by him? I came across a comment by Adele Haze, the spanking model/actress, about the Lupus film "The Noise"
Overview: It isn't any secret for the connoisseurs that Lupus have ambitions beyond those of a simple porn outfit. While they are always careful to please those of their viewers who fast-forward straight to whipped behinds, there is always a plot to entice and intrigue those of us who are harder to satisfy with a simple whack-ouch-whack-ouch sequence.
"The Noise" is a tribute to George Orwell's novel "1984″, produced to mark the book's 20th anniversary. The new incarnation of Big Brother is called the System, and every living person is its element. "The noise", then, is human equivalent of interference on radio waves: thoughts and deeds that are in any way original, out of line, purposeless. The System, being a sum of its elements, is, essentially, a self-maintaining and self-protecting creation; therefore, when any element (read, a person) threatens it in any way, any "noise" must be eliminated, and the "element" trained back onto the straight and narrow path.
Her comments are worth reading in full, here:
http://adelehaze.com/dvd-the-noise-lupus-pictures/So, being parsimonious with speculation, I'll say no more than that Menzel makes mainstream movies with spanking (or bottom fetish) scenes, and Lupus makes spanking movies with mainstream themes, and that the Czech film community is a very small place.