The moment you publicly compare yourself to the dominant player in your field, you have lost.
If you're not the dominant player, you want to make sure you can back your claims up though, because if customers try it once and they find the claim to be wrong, they'll never try it again.
Edit: I went back and actually reread what GP said and realized I was wrong if interpreted literally, but I took it to mean something more like "you know you're currently losing when you compare yourself to the competition". But yeah, my bad, you're definitely right under the literal interpretation - Apple didn't lose and may actually win at the end.