Why the need for a dichotomy? Everyone at such a level has a great positional and tactical understanding. Both are employed for the demands of the position and calculation and planning.
And no, it isn't harder per se but might be for some people. The goal in the end is to reach a superior endgame anyway unless something goes horribly wrong somewhere before that to allow a mating attack. Even then an attack on a king is only a tool employed within the context of obtaining long term advantages such as superior pawn structure.
Putting ten slightly unlucky instances, as well as some 90 odd rating points aside, there is no doubt that Naka is equal to Carlsen...