Third-party source indicates it comes from official website and we already have the image from the official website (webp). The big difference between the two is their format, the parent is the webp and this one is the png. I could not find the png version at all. I'm not the best at this kind of stuff, but I wouldn't say that I'm that bad at it either. Most images on the official website can only be found in webp. I observed both images very closely for difference in details and it was pretty lacking any real difference.

So what I believe is the most likely scenario: the user who uploaded on the wiki converted the webp file into a png one and they cropped part of the transparent background. I did similar edits on my own with the webp file and ended up with a size file roughly equal to this post.

This is why I'm flagging this post as an inferior duplicate ish that had a third-party edit that isn't bringing anything new. Best case scenario I'm wrong and we may find better quality images from Fate/Strange Fake. However, I'm pretty sure my guess is right for this one.