Flue Cured and 555 are both fantastic juices. In fact, I would say FC is my second fave behind Boba's. Completely different, though. FC is a very dry, flavorful tobacco. While BB is listed as a tobacco vape, I don't consider it a true tobacco. Not that that detracts from its awesomeness, of course, but to me it's just not tobacco in the traditional sense. FC and 555 are both more "traditional" tobacco flavors.
Like I said, FC is a dry vape that has a slight woodsy flavor. Slight, but not overpowering. That's one of the things I like most about it...the balance. Not too strong in flavor as some of the other FC tobaccos seem to be. Not peppery, but a pretty decent throat hit. Vapor, as with most AVE tobacco juices, is outstanding.
555 is somewhat similar to FC, but different enough that they are not clones. To me, 555 tastes like a more subtle FC with a slight nutty undertone. TH not as pronounced as FC but still good. Vapor of course is fantastic. I used to prefer 555 to FC but for the last year or so, FC has been been my go to "authentic" tobacco vape.
Both are great and I hope you enjoy them. Let us know your thoughts when you get them.