Hello mate,
If you're going with a comicky/cartoonish type of story I thing is actually better that you go with A - It struck me immediately how it reminded me of comic art style of the likes of Jaguar and aroma sensei.
I get what you mean about B, which looks very enticing, but i think the reason is because B art definetly looks 'younger', (like they look underage like 15-17ish) and very cute, which does go great with an adventure 'alice in wonderland' kind of cartoon game - but the color contrast is a bit too dark/shadowy, and makes it seem like the art is a bit noisy/dirty- whilst A seems very clear and cleaner, which is very easy in the eyes, and gives a better vibe for comic backgrounds.
Still if you want to go with B i would try to combine both A and B - or make B a bit clearer.
Thank you for making this art, looks GREAT (Both A and B), and yes C is very well done of course, but mybe too realistic, which makes the expressions a bit to dramatic. (the first C ella should be in a museum tho', its fantastic!) but the duo C has that movie sad-eastern-europe type of vibe. - So yeah A for me, B is very sexy too. Cheers!