Indentured servants were typically people who had agreed to work for a fixed period of time in exchange for passage to the Americas or for the payment of a debt. They were often highly motivated to work hard in order to fulfill their obligations and gain their freedom. However, they could also become frustrated and rebellious if they felt that they were being treated unfairly or if their conditions were too harsh.
Slaves, on the other hand, were people who were forced to work without pay and had no legal rights. They were often subject to harsh treatment and physical abuse, which could make them less likely to be productive workers. However, some slaves were also able to find ways to resist their oppressors and maintain a sense of dignity and self-respect, which could lead them to be more reliable workers.
Ultimately, the reliability of indentured servants and slaves depended on a variety of factors, including the individual's personality and work ethic, the conditions of their employment, and the level of supervision they received.