Coastal and Carpet Python - Difference?

[Raven01]

What is the difference between the two?

A Coastal IS a Carpet python. A subspecies.
Coastals are Morelia spilota mcdowelli. Likely the largest subspecies of Carpet python. (According to wiki there is a documented male that measured 12.99 feet, large even for a Coastal male).
The smallest subspecies I am aware of is the Irian Jaya (Morelia spilota variegata, I have 2 of these) generally top out at the 6-7 foot mark but have been documented at over 9 feet.

I find they do not deserve their reputation( as prone to biting) at all. I think it is more a myth perpetuated by a few people wanting to look cooler by having a mean snake or that have only had experience with juveniles. I am in the process of taming out an essentially feral 6 footer atm and haven't been bit yet even though he does "talk" to me quite a bit when he isn't in the mood for my invasion of his space.