Yup. Finland vs. Poland is tough. Poland is loaded with great black metal like Graveland, Ohtar, Gontyna Kry, Thoth, Furia, Mgla, Dark Fury, Kataxu and Wędrujący Wiatr. However, outside of black metal, I haven't heard much impressive.
Finland, on the other hand, has a lot more variety while maintaining the depth. There's great death metal like Demilich and Demigod, great black metal like early Impaled Nazarene, great power metal like Nightwish and Stratovarius, and the best funeral doom from Skepticism, Shape of Despair and Therogothon. There's also solid second-tier black metal, such as Oranzi Pazuzu, Sargeist, and Satanic Warmaster.
Finland, on the other hand, has a lot more variety while maintaining the depth. There's great death metal like Demilich and Demigod, great black metal like early Impaled Nazarene, great power metal like Nightwish and Stratovarius, and the best funeral doom from Skepticism, Shape of Despair and Therogothon. There's also solid second-tier black metal, such as Oranzi Pazuzu, Sargeist, and Satanic Warmaster.