Sonu Nigam Vs Arijit Singh - Best Playback For SRK in today time

I know srk is connected to abhijeet, and udit narayan too but in today time they hardly sing or its better to say they are not relevant much to current bollywood in term of singing...so now its between sonu nigam who himself sing less but still manage to sing despite of the poltics/banns and royalty issue which affected his bollywood carrier badlly and music company were not releasing his songs in past few years...when arijit singh came into mainstream ...and arijit dont need any introduction he is like singing everything as of today film music is concern ...and yes arijit singh is a regular voice of Shahrukh Khan...SRK of today who is not as young as rahul from kabhi kushi kabhi ghum ...or amarkant varma from Dil Se or ajay from phir bhi dil hai hindustani (banke tera jogi) or aman of kal ho na ho etc films...