I think the only difference was the damper that was fitted.
Most people change this and then change the stickers
And that’s the nub of it. Some people care about labels, others are quite happy with the same functionality alone. Personally, it never occurred to me to change the stickers on my Charger-upgraded Yari. And equally, I wouldn’t pay a premium to buy a bona fide Lyrik over an upgraded Yari, they are, to all intents and purposes, the same thing.
Your buyer is basically an idiot if he/she doesn’t realise this, however there’s not much you can do about this bar pointing out the obvious that the fork is the same thing bar a couple of stickers.