These guys are not doing what Tesla are doing. Tesla as a company is focused on building a manufacturing plant that is capable of producing Electric Semi Truck

These guys are not doing what Tesla are doing. Tesla as a company is focused on building a manufacturing plant that is capable of producing Electric Semi Trucks. That's what they're working on. Electric Trucks is the product of the thing they're working on. These guys are working on making Electric Trucks. The more apt comparison is that these guys are competing with the robots that will go in Musk's factory.