Let's just go with what you say.
'They are comparable'.
Then why couldn't Harald take the fruit? And Loki can just after one AdCoC strike?
Ragnir Choose Loki, it has nothing to do with Loki being stronger than Harald and that's why Harald couldn't take the fruit.
Alright, so what's Ragnir's criteria then? If not strength.
And why is Harald confident he could match said requirement
after getting a whopping great powerup?
Also them being comparable is pretty much a low end estimate for me, like I said "at the least".
Tbh I could see Loki being stronger for sure since he managed to put up a fight against power-upped Harald.