Advantages of BBCS2: Very polished 2D Fighting game mechanics. Plus, a personal favorite of mine. Disadvantages: WTF, NO ONLINE PLAY~. And I've heard of some performance issues overall. Can't confirm since I don't actually own the game, nor a 3DS.
**FROM WHAT I'VE HEARD** Both games - Framerate decreases when 3D is turned on. *DOA Dimensions* + Takes advantage of some 3D features, like 3D effect and gyroscope + Chronicle mode lets you play through stories of characters from the first DOA up to the fourth one + New characters not seen in the console versions + Ability to change between Japanese and English audio - English voices are ANNOYING - Online play lags really bad. It lags even when you're playing REGIONAL PLAY! *BLAZBLUE Continuum Shift II* + All characters available from the start + Plenty of unlockables to keep you busy - No online play.. Post Merge: [time]1311442635[/time] You could also consider Super Street Fighter IV 3D Edition + 3D effects are awesome + Switch to a "dynamic" camera view + Cool StreetPass feature + Ability to set four hotkeys - Awkward button layout - Graphics may not be as impressive as HD counterparts - Arcade Version is already out
DOA - Kasumi + Ayane = Nuff Said BlazBlue - No comment never played any of the series Street Fighter 3D - Capcom = Nuff Said [I am an Anti-Capcom activist?]