Same data, same network. Naive is what usually ships. Tuned follows every rule from the research: no stale results, no blink, no shake, keys that behave.
Each side is its own page, like two browser tabs. Click into one and your keys go only there. Search is a service worker with a fixed delay per query for the network you pick, so both sides get exactly the same network. Requests show in your browser's network panel.