Property tax includes the value of what's ON the land, land tax is the value of just the unimproved empty lot. IE, the location. Creating value on the land is

Property tax includes the value of what's ON the land, land tax is the value of just the unimproved empty lot. IE, the location. Creating value on the land is yours to keep, capturing value the community created (the location value) should go to the community. Otherwise you profit and rent seek from value you didn't create. That's the theory at least.