Hmm.
This reveals a few things.
1.) You are not as ok with your facial scars as you thought you were, or it wouldn't have had such an emotional impact on you.

for that.
2.) The comment about "affecting your beauty" was intended to be what I would call a "power comment" - meaning, it had the potentially intended effect of striking a target and elevating her value / beauty over yours. yes, Fi dominant folks can and do say things in a less than politically correct way, but to me there's something more to the comment, meant to kind of hierarchically establish who's the better looking between you. She no doubt feels that it's her, but ...
3.) The thing is, this comes from a place in her that's about her own inner insecurities. Saying something that piques yours is a way to add salve to her own woundedness in this area and try to help heal herself kind of at your expense. Perhaps she wonders, "If I am so attractive, why can I not hold a man? Look at Hetaira, she's not as flawless as myself, but she's got guys. What is wrong with me?" Well, as you've pointed out, it's a lack of seeing other qualities as having value too. Perhaps even far more value than she has previously assigned.
4.) So you ask yourself, do I want to be friends with someone who is willing to push my buttons in order to help frame her own experience as having qualitative value over mine? Well, as you point out in your last post, she is in your life for a reason. Perhaps the reason is for her to be reminded of values that exceed the physical realm and awaken in maturity here. Perhaps it is for you to realize that looks matter more to you than you thought and that this is a place of inner examination that may bear fruit in how you treasure yourself. We are all human and growing, at every point, 20 or 50 or 94.
5.) Which leads to forgiveness. Yes, she might have meant to hit a button, and that was unkind. An apology could be graciously accepted, and I hope in some fashion it's already been offered. You too can forgive her for that particular frailty. What would help your friend feel like she has something more to offer than how she looks? What would help you both learn and keep growing? What would help you not feel as affected by external judgements, being at peace with yourself here? Since there's a mutuality, these would be questions I would look at in maintaining the friendship connection.
Hope it all works out between you.