na, but your hurting your sparing partners feelings by using your bag gloves on his face. The key difference that I can tell between bag and sparing gloves is that sparing gloves have a leather or cloth covering for the velcro or laces so you don't scratch a guys face all up. They also tend to have more padding on the knuckle area and weigh more then bag glove. Other than that I'd say it doesn't really matter.