Medusa vs. CC Neu

hi,

atm i use the mmm 2200 combo in my lst2 and tt st-1.
i use 6s2p a123 cells.

if i change to a medusa 1600kv (70 or 80), will give me the medusa a better runtime or performance?
i will gear it to the same speed like now.
cc2200 give me a good performance, i dont look for more power. better runtime is more important for me.

same question for my tt st-1 truggy.
2200 is really fast, i must gear it with a 9t pinion.