Actually, the one pictured is melon, which is NLA. Stowa still have an orange dial available. They are slightly different shades, but not having seen the orange IRL I wouldn't venture to say what the differences are. Compressed and re-sized digital photos on a forum aren't the best way to judge subtleties of colour shading.Lots of great input and insight.
Collin makes a good distinction, however subtle, that the PD is a melon and not an orange face.
There are a few others to consider I guess too... Benthic, for example.
One other consideration...isn't it written somewhere that your first Stowa purchase should be the Airman?