Difference and comparison side by side.
The Norwegian Forest cat (Norwegian: Norsk skogkatt or Norsk skaukatt) is a breed of domestic cat originating in Northern Europe. This natural breed is adapted to a very cold climate, with top coat of glossy, long, water-shedding hairs and a woolly undercoat for insulation. Although this is uncertain, the breed's ancestors may have been a landrace of short-haired cats brought to Norway by the Vikings around 1000 AD, who may also have brought with them long-haired cats, like those ancestral to the modern Siberian and Turkish Angora breeds.
The Maine Coon is the largest domesticated breed of cat.
It has a distinctive physical appearance and valuable hunting skills. It is one of the oldest natural breeds in North America, specifically "native" to the state of Maine (though the feline was simply introduced there), where it is the official state cat.