Yes, it is a minor and unimportant distinction......
There is nothing you can buy or sell for 7 gold.....so you will never have to worry about a .7 plat item. Because of this many have adopted discussing values and trades in plat.......I would be happier if everyone would convert to plat as the base currency.
It's been discussed before, it will be discussed again......many don't care, since I am one of the few that do, just do it for Varrs sake.