mode of a duplicate classifier is worth it? : hello i have a question about a classifier concept.

case 1
if i have a classifier and the performance of that classifier up to 90%.
and i create n another classifier with the same algorithm and same dataset and get performance 90% too.

case2
same like case 1 but every classifier with a different algorithm.

and in the end
the result i get from 
mode(classifier1,classifier2,classifier3,...,classifiern).
is that technique worth it or useless (case1, and case2)?

thanks.

