At one time, I had these two RVN Gallantry Crosses, and noticing the difference of them, I took a picture to compare. One is a theatre-made medal. Notice the size difference, the difference in the pin on the back, and the difference of the palm device, as well as the colour.

 

Fronts:

 

Backs:

 

Courtesy of @gary cain:

 

 

Courtesy of @teamski -

 

 

Very nice examples!