Have been testing out different characters. First island after the boat. Good seems to gather and get xp while gathering, as intended. Evil however does not. Fails 40 percent more and does not gain gathering xp the same. 20 gathering attempts and gains 1 level on that gathering item.
This isn't because of the difference between good and evil, but simply of the RNG (random number generator). I know it is frustrating, but luck matters on success/fail/skillup, and you got less lucky on one than you did on the other.
What Denmum said is very true! I do my best harvesting on my brigand and fury the rest of them don't do as well even though skills are the same.