I don't think so. I have two G1 Long Hauls (one is from my childhood, another I acquired a few years ago at a Parra fair) and they both have the same shade of green.
Left: G1 1985 Long Haul from my childhood (my very first Constructicon!)
Centre: Encore Long Howl
Right: A 1985 Long Haul that I purchased just a few years ago
As you can see, both G1 Long Hauls have a darker green than Encore Long Howl.
Here are some links to other photos of G1 Devastator:
http://tfwiki.net/w2/images2/9/91/G1devastator_toy.jpg
http://tfu.info/1985/Decepticon/Deva.../robotmode.jpg
http://www2.unicron.com/images/igall...termarkpng.JPG