My initial reaction to the above was that it's a photoshopped image. However, the lighting on it seems consistent across the vehicle. Image searching doesn't bring up anything for it.
Assuming then that it's real, I don't really see what the point of it would be unless it was for some reason done just to test if it was even possible. I suspect the Centauro 2's turret armor isn't anywhere close to the Ariete's, and the tank already has a 120mm. I guess this would mean that the two vehicles have the same turret ring diameter. Please share if you know more.