Lenox and Folio are very similar--so much I wonder if they come from the same mill. Lenox is a natural white, similar to Cranes Cover Natural white, while Folio is whiter, though not as bright as paper with brighteners like Cranes flourescent white. They are nearly identical in speed and contrast with a given Pt/Pd mixture. The Folio is a little bit flimsier when wet while the Lenox is a bit stiffer and more robust, though they are the same "weight." Both handle easily. Lenox 100 is a standard sheet sold at Daniel Smith and other vendors as well, though I don't think I've seen Folio offered anywhere but Kinsella. The slight difference in base color can have a noticeable affect on some pictures. I like them both and keep them both in stock.