That's definitely noticeably different, wouldn't ride with that.
The stock rims had clear coat finish to it.
Phantom Grey was the touch up color they probably didn't use, you can purchase it on Amazon or ebay.
Try this guy, my coworker got curb rash on her rims too.
He fixed it to brand new, can hardly notice it. $100-150.
My advice to you is have him redo that front rim, bite the loss from Lexus unless you're ok with the way it looks.
Or if he can improve the look of it.