After Nordic released nRF52840, the confusion raised what the difference between nRF52832. Raytac provided an easy comparison chart based on module solution hopes to provide a quick understanding in between.
Another quick breakthrough is
What the products functionality needs to use nRF52840?
1. Products needs bigger RAM and Flash memory rather than nRF52832
2. Products needs to support BT5 Long range feature
3. Products needs to support Thread or Zigbee
Other than above functions requested, such as mesh networking, customers may use either nRF52832 or nRF52840 solution upon demands.