Hive or Nest UK Combi Boiler—suggestions?

Nest or Hive with Smartthing Hub… looking to purchase along with this radiator valves (smart) for each room to control the temp as well

Your thoughts recommendations please

Consider tado as well - I have the smart thermostat and rad valves, and it works brilliantly; the automatic geofencing feature was/is the best feature (unique until more recently). There’s a SmartThings integration at [RELEASE] Tado (Connect) too.