TIME OUT..............or more accurately, are we forgetting the time line here?
First of all the Scapini recreations are from 20th century.
The Vandenborre Bacchus is from 1780, therefore the Scapini Sun of the Cary-Yale deck cannot have been the source inspiration,
unless I'm overlooking something again.
Also, if we compare it to World card (Cary-Yale) it's seems that Scapini was attempting to provide aesthetic continuity.
According to DePaulis/Kaplan, the World card is authentic.
Compare the the original World card and the Scapini Sun recreation, the overall composition of both cards are nearly identical.
Notice the scalloped formation of the clouds and framing of the city on the ground below.
It seems to me that Scapini cherry picked various elements to "recreate" or more accurately, depict his own vision of what might be a suitable Sun card for the U.S. Games Cary-Yale deck.
The actual "Sun" head in the hands of Apollo/Helios is almost identical to the Pierpont-Morgan Visconti, which is also an authentic card.
The horse seems to be inspired by other depictions of the Apollo/Helios chariot being drawn by stallions across the sky.
I agree with JM about the Sunflowers (nice catch) .
The almost child-like countenance of the face being inspired by the Sola Busca is an interesting point, especially given that
Cherubic depictions of that time were never really that charming.......Cherubs though they may be.
At first I looked the Sola Busca, but quickly dismissed it.......well that'll learn me
Notice also the red attire/armor of Apollo/Helios in the Sola Busca and the red sash of Apollo/Helios in the Scapini rendering, as well as the authentic Pierpont-Morgan Visconti Sun.