You can buy the tables individually so don't buy MM and TOTAN if you don't want to. I doubt there will be any savings getting the 4 pack - I think you actually ended up paying a penny more on the mobile versions that way! TOTAN was 99c, Black Hole $1.99, Theatre of Magic $2.99 and RBION $3.99. I think. Of course I don't know how that will translate to MS points. Bloody MS points.
Improved graphics, physics and frontend should make paying for the repeated tables worth it especially as they will probably be discounted like TOTAN was being their "Table Of The Month" at 99c.