Ciro                   and                       Trifari

The Ciro piece has a more pronounced line down the front of the neck, the bodice is less fluid because the centre line is straight and the stones are arranged in lines, the waist line has not been re-established after soldering and the head-dress is joined to the arms in a much less delicate fashion.
The modelling of the hands is also more crude, there is no indication made for separate fingers as there is in the Trifari.
If you look at the side view on the main page you can see that the front of the bodice is also much less shapely in the Ciro.

In my opinion the Ciro is the product of a much less talented model maker.