This bootleg looks like a conversion of those Russian WEB-DL torrents.
And there’s a chance the quality could be worse, since Blu-ray can’t support 1080p 25fps, Blu-ray can only support 25fps in 720p or 23.976fps 1080p.
So either he’s lying and it’s actually downscaled to 720p, it’s we get missing frames with converting 25fps to 23.976fps by removing some frames, or it’s actually a proper 25fps to 23.976fps correction.

Either way, I really can’t see how the quality would be that different from the Russian WEB-DL torrents.