415 design is very mature and good for 6 cell race. Up to now, its difficult to say whether TA5ms is good or bad. But at least I would comment TA05MS as follows:
1) Except re-arrangement of motor position, TA05MS has not improved so much from 415.
2) TA05's design is still based on 6 cells. will be not balance for 5 cells or lipo