CyprTree01 is sized same as the stock object, so it works well as a direct replacement.
CyprTree02 is sized as a large tree. 

Something that works well on these trees is having them ignore light with Extra Light property, at least where possible. Lighting in Dark Engine usually exposes the planes and tends to make it look bad. Try setting extra light 0.08 (additive false) or similar value depending on your ambient lighting setup.