I don't believe for a moment that they couldn't be mutually exclusive. The Ultimate Edition could quite well come with one and not the other.
Their scam here, is to get you to consume the boost ASAP.
It's shady design and on purpose. Otherwise they would have changed it a long time ago.
Look at it this way, there is absolutely no reason they couldn't have just dropped it your inventory like all the other items. If you wanted to use it on another character, fine, drop it in your shared slot and use it, simple as that.
This is all my opinion based on common sense and doing what's best for the customer. 🙂