PROS:

LAMB:
A tasty meat that, when cooked well, can easily be the tastiest red meat in the land. Amazing when accompanied by a rich gravy and some fine mint sauce.

A MUG:
A fantastic receptacle for holding tea, coffee and drinks at house parties when you've run out/broken all of your glasses.

CONS:

LAMB:
When cooked badly, lamb can be tough, stringy and tasteless. Lamb is also comparatively expensive when next to other meats. Lamb is generally frowned upon by vegetarians, pescetarians, fruitarians and vegans.

A MUG:
Many mugs are quite horrible to look at, particularly when owned by people that are older than me. People that are older than me are also prone to dropping mugs on their feet and clogging up the NHS with foot injuries and wasting time that could be devoted to smokers and binge drinkers.

WINNER: A MUG
Mugs have just too many daily applications and uses to ignore. Lamb, a member of the 'meat' family suffers from being overpriced and lacks technical support in today's increasingly anti-animal society.