Like Peeled Paint, Crushed Olive is warm but not yellow. Forest Moss is much darker and more old fashioned army green. I like Crushed Olive because is is a much more realistic spring green -- the brand new leaves found on some plants but not brilliant or stereotypical. Some people would call it a light olive but that is a grave disservice. Crushed Olive is a natural color, not drab or gray in any way.
If you want a pair of greens Crushed Olive and Peeled Paint are a good choice. But look at Bundled Sage and Old Paper first which are lighter and less saturated. It depends on the type of stamping or other that you want your greens to represent.
This is my absolute favourite colour out of the 2010 range of distress inks. Suitable to use in Christmas crafts, it is quite vibrant and works with Rusty Hinge and Wild Honey beautifully! Watermarks well.