That's how it looks to me too. Not a "razor sharp" corner, but a worn corner made to appear better by a lack of contrast and very tight cropping. Almost to the point of cropping off a tiny bit of wear.
"Excellent condition" can be interpreted differently by different people. And traditionally has been. It's worn and VG when buying but excellent when selling. Even with standards there's a bit of interpretation. Which is why on the card side we now have TPG and also why we have arguments about TPG.
Of course, I could be wrong, and either could be completely fake. The overlooked thing is that if someone can and will fake a photo and signature, well, they'd obviously stop at the next step of faking a cert.
Or would hesitate before claiming something was in excellent condition to make an Ebay sale
Steve B