Two is to look at the color: beef fat than lamb to white; lamb color reddish a little bit, while the beef color belongs to the dark red a little bit of color.

Three is to see the texture: lamb than beef to fine.

The fourth is to see the meat fiber: beef fiber thick, lamb fiber fine.

Other differences:

Lamb is high in protein and low in fat. Its protein content is lower than beef, higher than pork, fat content is higher than beef and less than pork and carcass fat layer is thin. Beef high protein food, nutrients are easily absorbed by the body.