There are many differences between them: species, location, birth... The best way is to google. One thing they both have in common is they both are not a beginner snake.
One of many thing that I find fascinating is how they are from totally different locations and different species but have evolved to be green tree dwelling snakes. GTP from New Guinea and ETB from South America. Evolution is truly amazing!
well think of this...think of the large flightless birds....same kind of deal going on.