Industrial Raspberry Pi computers (one is explosion-proof)

In today's video, I highlighted industrial Raspberry Pi computers. Specifically, the Lincoln-Binns CM4-Box Pro, the Onlogic Factor 201, and fieldcloud's Mil├╝-X Industrial IoT Gateway.

Onlogic Factor 201 Industrial Raspberry Pi computer

And I asked Lincoln-Binns, Onlogic, and fieldcloud what makes an 'Industrial' Pi any different than a Pi and an enclosure like you could buy from a normal Pi retailer.