OMG, you are not making it any easier for me to decide
Because, since I'm still a beginner, I would compeed more in the stock-classes and not the very powerfull Modified. So hence, A TA05MS would be OK then.
All I know is that I drive best when using a fluid style. I discovered I drove best when driving with a One-way. The Spool made it possible for me to "attack" more but I would then make more mistakes.
On the other hand, since the 416 is OK too, or the diff is small anyway, in case of indoor-performance ... maybe it would be smarter for me to go with the 416 ... but at a much greater cost. I would not be able to use my TA05-parts (spool, diff, one-way) and have to buy new ones + the 416 chassis is more expensive.
Also, Is the TA05MS a keeper? I mean will the parts stay around, easy to find?
The 416 has a Tamiya-number beginning with 49... , so it is only a temporary thing also ??!
Deciding is difficult.