Yea somewhat...you have to remember these locales are only separated by miles. Also I know that Connie Dorval, a very well known chameleon breeder with many years of experience, feels that Ambilobe is not a true locale, just an area where many locales come together. I can see where she is coming from after looking at many of the locales. I mean look how close Sirama, Ambilobe, Ambanja, Ambato, then the islands right off of it.
But anyways from what I have seen, read, and heard; Ampiskiana have more of a U bar with green barring. Also, I have one for you, is this Ambilobe or Sirama:
Now go to
http://www.gatwickreptiles.co.uk/chameleon_3.htm
I don't know, I mean Ambilobe can almost look like anything, from a Nosy Be to an Ambanja all the way to Sambava. I have seen them confused with almost every locale except Tamatave.
-chris