Since the initial question of this thread has already been answered, I hope it is ok to derail it a little by talking about this.
I think the scars should be introduced earlier and differently for two reasons: Player agency and narration.
You have different options to telling your companions about your vampirism with Origin-Astarion than Companion-Astarion has - you can confess to them upon first meeting them, you can clumsily bite an enemy while in their vision and be discovered. You can also decide to share your whole tragic backstory with Shadowheart when sharing a bottle of wine with her. So you have been given a choice to be more trusting than Companion-Astarion would be, just the important topic of the scars seems to be Act 2 locked.
In Act 2 the scars will be introduced for Origin-Astarion either on your second long rest or by meeting Raphael. When meeting Raphael first, which is a very likely scenario, the question about the scars is buried somewhere within the dialogue and easy to miss if you not instantly jump on it. For an story element of such importance of your own character this is a little clumsy, especially if this the way the scars are first mentioned. If you instead get the long rest scene first, Astarion has a nightmare during which he can either try and succeed to figure them out on his own or try to go back to sleep. There could (maybe easily) be a third option for one of your companions to wake up and ask if your are doing alright. This would replicate the scenario of the companion version while allowing for a chance to bond with one of your companions and involve them more in your own story.
