yes, the dragonborn is indisputably more powerful than the nerevarine
strongly disagree.
nerevarine can fly, teleport around, has access to working invisibility, can achieve true invisibility (100% chameleon), can empty entire dungeons with a single gesture, and has access to waaaaaay better enchanted equipment.
even for non-mages, at anything lower than max level a smart nerevarine has already found at least full glass or mostly full daedric while the dragonborn is going to peruse through cadavers forever.
dragonborn can just belch very very loud.