Moving from 2015 C300 amg ext int to 2017/2019 C63?

Few weeks ago I have tested new RS4, and also 340i, Giulia QV and decided to stick with MB.
Is there anyone who upgraded from C300 or any other weaker engine to C63/C63S? Is it worth to wait for facelift, if i want sedan again (probably only 9G is the plus?
How are the runnig cost compared to C300?
thanks for info



