I give Kuzan the advantage.
He has Busoshoku, and Lightning can't pass through Ice like Magma would.
Enel wouldn't be able to last 10 days against someone who has superior Speed and Combat Skills than Luffy.
Considering that Kuzan was a former VA, I say there is high probability that he had Kenbunshoku as well and possibly Rokushiki.
To put it simply, Enel can't touch Kuzan but Kuzan can touch Enel.
Chapter Topic: Question - Are these related somehow?
We all know that Oars was bigger than a Giant, so what your thoughts on these images??