I make a lot of orchid shots and have noticed that red orchids are amongst the most difficult objects to capture with good color fidelity.
All pictures on tripod from the same position, illumination by Xenon lamp. RAWs developed in Raw Therapee.
G1 - Macro Switar 50mm/1.9 @ f/11 - ISO=100
Nikon D700 - Kiron Macro 105mm/2.8 @ f/11 - ISO = 200
The G1 catches the color of the flower correctly, the D700 colors are not realistic .
D700 - resized to same dimensions as G1. Both crops slightly sharpened