i'd say,normal naruto is jonin level while sm naruto is top S class level,but can still hold his own against kage level tiers. But comon,saying he is low-top kage lvl without km or bm is a little pushing it. He is strong no doubt,sm is his power alone with or without the kyubi.but naruto claimed himself that he wouldnt stand a chance against the raikage if he werent in km mode. That sm clone didnt defeat 3rd raikage alone,he had help from the hachibi,and was given protection from dodai and the other shinobi. Besides,it fought him in km and wasnt able to beat him,sm was just better since he wasnt as fast as his son,so sm naruto could outmaneouver him,sm was the better option there. And IIRC naruto's clones havent beaten any kage alone,the mizukage was beaten by gaara and onoki,kazekage was beaten by gaara,muu was beaten by gaara and the clone combo,the raikage was beaten by naruto clone with help from the 4th division amd dodai as well.only gaara actually beat a kage alone,but it seems like his dad was just testing him in that fight but i am not sure. But saying sm naruto can take on raikage,onokietc. Or saying a km clone can defeat the current kages alone is insulting.all in all,i'd say km naruto is high kage lvl IMO