🚀 go-pugleaf

Could some of you give me a capsule summary of the major differences
between various generations of Forth -- eg, FIG, '79, '82, etc?
What extensions do more recent versions have?
I'm trying to select a Forth for Color Computer, have about 3 choices
at widely varying prices.  I don't expect (but will take!) advice
on my particular machine, but since all vendors describe their product
in terms of the above generations, I can use the general info.
I've bougth & started Brodie's "Starting Forth", so feel free to
reference that (and, what generation is THAT Forth?)
	T.I.A., mike k