Both can be used for the same purpose and it's just a matter of choice. For example, what if the house owner / real property company announces it's acceptance of bitcoin / bitcoin cash then we can just simply use them for good.

But to be realistic, bitcoin can be used for any type of transaction -- small, medium or big ones. I'm not for bitcoin cash but bitmain has announced it's support to that coin.

And if I'm not mistaken transactions to them are big because they are the most popular manufacturer of mining equipment.