Well, the OP promises more Yui (in pocket-sized form, too!), so I'll be looking forward to that.
In the meantime, Sugu is a great not-quite-blood-related-enough-imouto-smitten-with-her-onii-chan character, while Sugou is a total slimebag of the 100th degree.
Preview: Looks like SAO is crossing over with Jinrui wa Suitai Shimashita! ...or not.