ISTA P will give you answer what module version you have and what is newest one.
If you dont have ISTA/D and you have winkfp with newest Daten files before update it will tell you what version you have and what is newest one.
BMW didnt make a change log so tru differences are not know
Most people get better mpg, better throttle response, faster gear changes and a bit more power on car, plus new DTC icon and many more