The short version
Same core job, very different wrappers. The Eight Sleep Pod 5 is the maximal smart-bed system — HRV tracking, Autopilot software, top-down climate and full-bed extras — at ~$6,099 plus a subscription. The ChiliPad Dock Pro delivers the same dual-zone water cooling for ~$1,700 once, no subscription, no tracking.
When the Eight Sleep Pod 5 is the right pick
You want tracking and software baked in — HRV and sleep staging without a wearable, Autopilot adjusting temperature by sleep stage — plus the top-down blanket, adjustable base and audio, and the price and membership are acceptable.
When the ChiliPad Dock Pro is the right pick
You want the climate hardware alone, done well, without the subscription — and you already wear an Oura or WHOOP for the data. Same dual-zone water cooling, roughly a quarter of the 3-year cost.
Also worth comparing
If you want the same debate one generation down, see Pod 4 vs ChiliPad Dock Pro. Full field: best smart sleep-climate systems.