I thought it was obvious that Naruto already surpassed his father. However, being stronger doesn’t automatically guarantee an absolute win in a fight. With their case, it was very hard to predict who will come out victorious in their battle.
Power Wise: Naruto
Strategy & Intelligence: Minato
Speed: Most probably equal
Chakra & Stamina: Naruto
Battle Experiences: Minato
Imo, the fight could go either way because Minato still have the FTG seal on Naruto. Should Naruto decided to use TBB on him, or whatsoever jutsu’s he has in his sleeves, Minato can use the Space-time barrier technique and redirect the attack back to him. However, should Naruto somehow, no longer possess the FTG seal, then he can defeat his old man from mid – high difficult unquestionably. Though, worst case scenario, Minato can always stalemate his opponent by using DRS as his last resort.