I guess it would be pretty cool if Gilmore listened to Opeth, and if he collaborated. But I highly doubt he knows Opeth and he doesn't have much involvement in music anymore. After division he pretty much did nothing until the recent On an Island, which I liked, wasn't great or anything. Both are amongst my favorite bands but imo everything between Saucerfull until Meddle was pretty mediocre. Meddle through animals is my favorite. Albums after animals are ok, nothing great imo. As to which band is better thats a really hard question for me as Floyd were my favorite childhood band, and Opeth are my favorite band now as an adult. But I have wondered if any of my childhood bands members are into Opeth, people like lifeson, mcartney, ian anderson, gilmore, jimmy page, fripp....the list goes on. As does the list of current popular musicians like Thom yorke or Omar Rodriguez-Lopez; I wonder if they are into Opeth? Who knows. I remember thinking in 2000 when people hardly knew who Opeth were this band won't stay a secret forever, they will find a much larder audience who digs their sound, so who knows maybe they will reach a level where some of these guys become aware of them. I think we can hope for collaborations more at there level of popularity rather than hugely popular people like Gilmore. I remember thinking recently I wonder if Mike and Ihsahn will collaborate; and they have so I'm hoping for more collaborations at that level. Plus I also doubt Gilmore would be into Metal; and Opeth are a "metal" band so this makes it even more unlikely he knows them as well. They are marketed and represented as one so even if he had heard of them I doubt he would even imagine that it also included a lot of prog influences, the metal aspects would turn him away I would think. Someone send him Damnation in a fan letter haha.