Your question is a bit tricky to me.

You are trying to compare a theoretical quantum channel capacity with the capacity of a real technology for classical communication. I'd like to help here but first please simplify the question so that the comparison make sense.

As regards your first question, I published an experimental paper, exploiting indefinite causal orders to achieve communication by means of 0-capacity channels. In brief, the document explains and witness a quantum advantage in communication, by means of superposition of channels.

Your question is a bit tricky to me.

You are trying to compare a theoretical quantum channel capacity with the capacity of a real technology for classical communication. I'd like to help here but first please find a single format to your questions.

As regards 1st question, I published an experimental paper, exploiting indefinite causal orders to achieve communication by means of 0-capacity channels. In brief, within the document you will find a detailed example of quantum advantage in communication (by superposing channels).