IMO this fight will be about the potential of humanity.
Tesla represents progress, a new age for humanity, a height we can strive towards. He makes machines and technology that benefits humanity
Beelzebub on other hand represents stagnation and decadence of humanity, He uses technology to make monsters, demons and tools of destruction
Tesla will lose ofc, it is always easier to tear something town that to make it.
But i feel like by the end Beelzebub will have a new found respect for humanity