What scale changes about the comparison
A small requirement attracts fewer bidders and less effort from each of them, which is rational rather than dismissive. Asking for elaborate proposals, formal evaluation criteria and detailed reporting will mostly produce fewer responses. Two providers giving you a clear page each is a better outcome than four being asked for documents nobody has time to produce or read and it wastes the time of providers who were willing to help you.
It also changes what supervision realistically means. A provider is not going to send a supervisor monthly to a premises attended for an hour twice a week. Rather than asking for something that will not happen, ask what does happen: who attends, how you contact them, and what the provider does if you report something. Honest answers at this scale are more useful than aspirational ones.
