Two sites, one rule, no overlap.
Not two audiences on one site behind a filter, and not one site with a business section. Separate domains, separate deployments, separate databases. The cost is real, two of everything to maintain, and it buys the thing that matters: neither site has to hedge. A services page can make a claim without a poem beside it undercutting the register, and a postmortem can admit a month of blind monitoring without a prospective client reading it as a warning.