Indeed but one sells devices only at a flagship price point and the other sells everything from £10 PAYG devices to flagships that do compete with each other. If Samsung didn't sell more devices across their entire range than Apple, I would be astonished!Samsung nor apple doesn't break down individuals so we can only use entire range from both companies.
Apple will never sell more devices than Samsung because they compete in one market as opposed to many, so I'm not quite sure what we draw from such a statement if the attempt is to use it as a comparison?
If that statement is enough for some to prove Samsung's flagships are more popular, because sales are bumped up by budget devices, then I won't argue with that. It's just a shrug your shoulders type of comparison for me.