# of possibilities (consider the order) for the first case: C(6,3)*6*(5*4*3)=7200
for the second case: C(6,4)*6*(5*5)=2250
It seems that the first case deserves less points (or the second deserves more points).
I'm not sure about the "不为4", do you mean in the second case, the 4-same-number-dices can not take number 4? If so, the second case is more rare, and deserves even more.