I think they're saying that Norway would also have the same number of deaths as Sweden if they had the same number of nursing homes.

Come on. He's pointing out both an explanatory factor, i.e. larger groups of vulnerable clustered together, and also saying that the total deaths may end up being very similar between countries and that it is too early to tell. Without a vaccine or effective treatment, there's no long term alternative to something akin to the Swedish strategy.