Differences Between The Forest Cat & Maine Coon & Siberian
Reference	Norwegian Forest Cat	Maine Coon Cat	Siberian
Head	Equilateral triangle	Wedge shaped with a square muzzle	Broad, modified wedge with gentle rounded contours
Nose Profile	Straight, no break	Gentle curve	Nose has a slight curvature and the lower portion to the tip of the nose is concave.
Eyes	Almond shaped	Large with open expression	Large, almost round.
Ears	Outer edge of ear follows the line of the head down to the chin completing the triangle.	Set high on the top of the head with not more than a ears width apart.	Set high on the top of the head with 1 to 1 1/2 ear width apart.
Body	Medium in length, square in the appearance.	Long and rectangular.
Legs	Hind legs are higher than front legs.	Medium in length	Moderately long, slightly rear legs longer than the front legs
Tail	Long and flowing, as long as the body, circumference can reach 12" plus in circumference.	Long and flowing, as long as body, not as bushy.	Wide at base, blunt at tip. Even and thick long hairs drape down from the top side of the tail.
Coat	Distinctive double coat, long guard hairs covering a thick wooly undercoat.	Silky, shaggy, uneven coat with a slight undercoat.	Moderately long to longhaired.
Ruff	When cat matures, a profuse ruff develops around the neck.	Moderate frontal ruff around the neck.	Abundant
Mature Size/Age	Up to 15 pounds, Females age 3 (7-10 lbs.) Males age 4. (10-15 lbs.)	Up to 20 pounds, Females smaller, Males larger.	Not given