Concrete floating docks and the Mulberry comparison

Could concrete floating dry docks, similar to Mulberry harbour caissons, provide a suitable lower-cost option?

Concrete is expected to form part of the proposed docks, but the answer does not establish a cost saving.

The comparison with concrete Mulberry harbour caissons is broadly accepted. Concrete is expected to form part of the docks under discussion. The answer provides no comparative price or detailed design, so the suggested cost saving remains unestablished.