Their "real wood" stuff, at least here in Poland, seems to be made from very soft wood, most likely pine (90%+ of forests in Poland are pine). The dark variants

Their "real wood" stuff, at least here in Poland, seems to be made from very soft wood, most likely pine (90%+ of forests in Poland are pine). The dark variants (pretending to be exotic wood I guess) are just pine with a dark coloring. When the pine gets nicked, which happens often because it's so soft, its natural color comes out, and sticks out on an otherwise dark furniture like a sore thumb.