For me ferric chloride is the closest to the vinegar and fruit etching in color. Green? - weird......not happened to me, only browns and yellows.
Those browns and yellows are active rust - I’d be weary about any of these warmer colors!
I suspect that varying (technical) qualities of ferric chloride as well as different usages and possibly recycled etchant are responsible for variable results.
Greenish colors may result from copper dissolved in the etchant by contact with brass, etc.