The biggest difference you'll notice in the jags today is the price tag. If it's a pure coastal jag the husbandry is going to mimic a normal coastal. Cage size, diet, breeding, etc..

If you are really looking for a jag with a light base you might inquire and see if Mike Curtin is going to produce anymore ivory jags this year.

http://www.city-data.com/forum/attachments/san-antonio/39453d1239233722-centipedes-_41069480_centipede_pa_ok2.jpg
http://www.city-data.com/forum/attachments/san-antonio/39453d1239233722-centipedes-_41069480_centipede_pa_ok2.jpg

Those are the best pictures I could find. I've seen some more recent pictures of some of the clutch and they developed beautiful creamy white base colors.

You may check out www.moreliapythons.com as it's a more active morelia specific forum with quite a few members who breed jags.