I think she means the mangas of the different episodes I've started seeing in stores, even though they're not realy mangas. Mangas have to be made in Japan, be in black-and-white, and read right to left to be classified as mangas in my book.
Actually, I'm pretty sure most of the bonuses on Mega Nemus are lower than the ones on Nemus. I'd have to look it up, but I'm pretty sure that's how it works.