every "sport" has its own extent of difficulty. in my opinon, both are equally matched. because in dance you have to contain any signs of pain, struggle, etc. in soccer, who cares!
but both are difficult
Soccer takes more blood and guts and you need to be more tough so i give your friend that much credit.
But dance is much harder, sometimes physically, but most of the time mentally. The steps look easy, but when you take a class its way harder than it looks. Plus, dancers aren't allowed to show their pain. And have you seen pointe shoes?!!?