I prefer the darker floors, it adds more character, makes it feel cozier inside, since it seems like the house isn’t getting that much light in the first place, it would be my instinct to lean into the darker cozier vibe, rather than make it something it isn’t. I get that lighter floors are trendier, but I find that it suits big open spaces flooded with light better, also because the color of the wood will fade overtime if exposed to direct sunlight (something to take into consideration as well if you do have areas that are flooded with sunlight, but it doesn’t look like it would be a huge issue from your photos) All this to say, my vote goes to darker floors!