Which is more virtuous: The call to prayer (Athaan) or leading the prayer (Al Imaamah)? 
The correct stance and Allah knows best is that leading the prayer is more virtuous, because that is what Allah chose for his prophet Sallallahu Alaihi Wassallam, the proofs which have been reported in regards to the virtuous of the Athaan don’t indicate upon that it is more virtuous then leading the prayer. 
Look at Al Mughni 2/54
Fathul Allaam 1/478
Majid Jawed Al Afghaanee