Circadian vs “dim to warm”

I just read a great article about a company wanting to do Circadian lighting on the International Space Station! It was very inspiring, so now I want to look into automating that. Up until now, my priority has been smart switches (both Zigbee and Z-Wave) and voice control, but I also have an automation to dim when it’s bed time.

Can anyone compare Circadian vs “dim to warm”, by how happy you are with results, cost, complexity? I guess I’d have to get all new bulbs either way, but I’d have to rewire and reconfigure switches for smart bulbs to do Circadian and I’d have to actively automate, vs “dim to warm” would just do it