Well, Remember11 had distinctly 2 different artists: the character sprites do not match the CG at all.
In fact, it seems the designer who made Ever17's did the R11 ones, but didn't do the sprites.
I personally think it would have been better with that style for everything: R11 sprites had... some sort of a drowsy look for some reason (I really can't stand Kokoro's character sprite design
)