Quote Originally Posted by MasterOfMoogles View Post
Absolute Duo, World Break, Unlimited Fafnir, Sister Devil
These are all basically the same show.
Matsuoka Yoshitsugu (Kirito) is hilariously in both Duo and Fafnir.
Tomatsu Haruka (Asuna) is with him in Duo, and not the main girl, for even more lulz.
Duo/Fafnir/Trinity Seven from last season appear to be almost exactly the same show with Kirito doing his harem thing in all of them.

Animation-wise, Duo is probably the best of these so far.
World Break is probably the dumbest, but has decent female VAs (OreImo imouto, Madoka).
Sister Devil had an okay first episode, and as a good male lead VA (the Irregular, OreImo bro).

Don't expect much from any of these.
While I definitely agree with the assessment that these are basically all the same show, the succubus is what makes Shinmai Maou no Testament (Sister New Devil) stand out far above the rest. The second episode makes it stunningly clear.

Played amazingly by Fukuhara Kaori (Kudou from Inou Battle, Tsukasa from Lucky Star). She's rotten to the core, and very much the highlight of the series so far.