Its not enough as an advantage really?I think he is a GGG type of fighter only with longer preferred range and more mobility. But if you look at it both of them thrive when they are on the front foot and they have place and time to put together their combinations. Both want to narrow down the free areas for their opponents as much as possible cause that gives them a set target and none of them really like to punch in the fly. That's why they both developed not fast but very good footwork in order to cut down the ring and both of them are aiming to push he fight to the ropes or even more in a corner, because there they trap their opponent, they can set their feet and throw their combinations.
I think their weak spot is they are too reliant on their preferred punching distance. They have nice counters here and there but if somebody smothers their action they reset and try to find the preferred distance again. Ad Ward is the master of playing with distances.
They also both don't like to box on the back foot or in the middle of the ring for a long time. They are also not built to rugged inside fighting.
And nobody underrates punching power, but it's ow it's not enough as an advantage, this has been proven in the history of boxing many times.
If Kovalev would have anything besides punching power and size where he clearly better than Ward he could have a better chance in my eyes but he hasn't... He isn't faster, or smarter or more skilled than Ward.
I'd think their stamina and chi are similar, none of them showed weaknesses those departments, (and yes I know that both of them have been KDd...)
I forgot to paste the interview.