Different modes of co-ownership.
In the building you’re talking about, each company has&#x2F;rents some distinctive piece of real estate.
Not the case with gigafactory.
E.g. read there: <a href="http:&#x2F;&#x2F;fortune.com&#x2F;2015&#x2F;11&#x2F;03&#x2F;tesla-grid-batteries-gigafactory&#x2F;" rel="nofollow">http:&#x2F;&#x2F;fortune.com&#x2F;2015&#x2F;11&#x2F;03&#x2F;tesla-grid-batteries-gigafacto...</a> As you see, Tesla’s saying <i>they</i> will be producing cells, not Panasonic.