I agree. Kyouko's role in kyomami is pretty different than in kyosaya. Need moaaar doujins
Not so much. Just less bickering.
There's a difference in behavior and age between Sayaka and Mami. With kyou x saya it can go either way, they're basically toe to toe with each other and generally just mess around, which is pretty fun to watch. With kyou x mami there's a noticable control shift towards Mami where she's the older, mature one pushing forwards and messing with Kyouko, who's now in a younger position.
Personally I prefer kyou x saya but kyou x mami has potential for some really nice reversals and reversals are the best.
