Frank Miller's "vision is perfectly matched to that of Eisner," said Lionsgate Theatrical Films prexy Tom Ortenberg.
I think it's important to keep in mind that this quote may have come from a press release package or something similar. I don't think the president of Lionsgate knew what he was talking about, if he even said that quote that's attributed to him. And although I can't speak for either Frank Miller or Will Eisner, my personal suspicion is that they would both disagree with it.
I think Miller's work and Eisner's work are very different in many ways.
But I also think that Frank Miller is strongly aware of that.
I met Frank Miller in the 1990s in San Diego, where I got the opportunity to hang out with him for a while. Will Eisner was having a big birthday bash that year, and I was impressed with how friendly and self-deprecating Frank was. He clearly respected and admired the works of The Greats. He was an amazed and admiring fan-boy when he met Gil Kane and when he met Will Eisner.
With
Sin City, Frank did a pretty good job of being faithful to his own work. Hopefully, he'll be just as faithful to Eisner's work in
The Spirit. I wouldn't be surprised if the film has many scenes duplicating Eisner's actual panels.