There are few videos on the 8.25 on YouTube...
Many others did comparisons on the more direct upgrade lenses for the OEM lens... primarily between the Peau 3.97 and the PixAero 3.77.
Results vary with your intended use. If using exclusively for photos,
the Peau 8.25 will provide a quality image provided it is installed correctly. It's use in video becomes much dicier, but if used in limited shots, you can still get some good B rolls. The gimbal of the CGO3+ simply will not eliminate all the visible vibration from the magnified image.
If however you are thinking you can get quality video for inspections with a TH upgraded with the Peau 8.25, I will just say that as a photographer, there is more than just image magnification that has an influence on your final quality. You would be better off with a Plus and the C23.