According to my Sheep Production Handbook (page 104):
Dry Matter
Sheep: 17.4-18.9%
Goats: 11.9-14.0%
Fat
Sheep: 5.5-7.5%
Goats: 4.1-4.5%
Alb. Glob.
Sheep: 0.9-1.1%
Goats: 0.4-1.0%
Casein
Sheep: 4.3-4.6%
Goats: 2.5-3.3%
Lactose
Sheep: 4.3-4.8%
Goats: 4.1-4.4%
Kcal/100g
Sheep: 113
Goats: 77
Dry Matter
Sheep: 17.4-18.9%
Goats: 11.9-14.0%
Fat
Sheep: 5.5-7.5%
Goats: 4.1-4.5%
Alb. Glob.
Sheep: 0.9-1.1%
Goats: 0.4-1.0%
Casein
Sheep: 4.3-4.6%
Goats: 2.5-3.3%
Lactose
Sheep: 4.3-4.8%
Goats: 4.1-4.4%
Kcal/100g
Sheep: 113
Goats: 77