Famitsu has details on Senran Kagura Shinovi Versus.
-20 characters
-PSN online via Wi-Fi
-Battles are set up on a 3D field
-Clothing Destruction will be present
-2 new schools (Death Cram and Red Blaze)
-Hebi and Hanzou schools return so the orginal cast is playable
-New characters unveiled are Yuki Izumi, Kusamura, Yozakura, Shiki, and Minori from Death Cram
-First Print bonuses include the standard Senran Kagura fare (Visual book, OST and Drama CD), and a folder of softcore nude images of the girls.
-Special Edition for 10,810 yen
Source
Source for the special edition pricing
I call multiple editions with different ratings like with Lollipop Chainsaw one with just the game and CERO D and the second with the bonuses and CERO Z.