Character movement in animation vs. in script

Hello,

I have come through couple of tutorials on the internet and as far as I understand, in order to move character, there are two approaches.

1. Create animation, which would animate movement as well as change character position. Then in C# script, we would just pass parameter speed into animation and then animation would handle the movement itself.
2. Create animation, which would only animate movement. No translation is be applied in any axis. Then in C#, we would take care of position change, based on speed.

I really cannot choose, which approach I should use - as for me, both looks more less the same.


Which approach is the right one (best practice) in
A) 2D game?
B) 3D game?

Thanks