Difference in exposure latitude Kodak Portra 400 and 160

Prints made with Cibachrome paper did need a mask to prevent loss of detail in the shadow areas. Here is a contact print made from an 8x10 Ektachrome on Cibachrome paper:

http://jdainis.com/park642.jpg

The original print does look much better due to the very shiny surface but all the detail in the shadows is lost. Here is the tree trunk on the Ektachrome off to the left as photoed against a back light.

http://jdainis.com/park400.jpg

All that detail is lost in the Cibachrome print.