4-2-3-1 play well which sure depends on centre attacking midfielder and 2 defensive midfielders... you can see World Cup ... France use this formation to go in the final ...
4-3-2-1 ... it is a nice formation which can play like "10 up 10 down" ... However, midfielders must have non-stop power and average skill ... that's not too easy to find players like that ... Roma is using this formation ... they can play wonderful matches very time ... but always run behind "The Cup" = Great Victor ....
If you want me to choose ... 4-2-3-1 is better than 4-3-2-1 (in my opinion only) ^o^