Axanthic lines in the us are different than the axanthic lines in Europe and they do not mesh. There are many different morphs both line bred (yellowjacket), recessive (axanthic), co-dominant (tiger) available in the Us. There are a lot more than listed above.
As far as womas go there is not much in the way of morphs like the black-heads but the different localities they originally came from carried greatly and although it is impossible to get locality specific womas here the melting pot of genes has made for some wild line bred stuff.
Keep in mind both black-heads and womas can change a great deal in looks from the time they hatch into adulthood. The most common change muddies their color and contrast making beautiful hatches into ugly adults. More selective breeders have for the most part line bred this trait out of their stock but unless you can see the parents you have no idea what the hatchling is going to look like when it grows up. Basically you get what you pay for. I have seen womas for as little as 250.00 and as high as 500.00. Black-heads as low as 750.00 and as high as 10k (morphs). These are current prices, 20 years ago they were 10k for womas and 20k for black-heads.
As far as physical differences between the two the black-heads do get larger to a point but the really big ones are big due to feeding bias and typically die young because of it. Healthy bhp's can be as small as 6". Womas typically top out at about 4.5 to 5 feet. Both are slender however the womas have a triangle shape to them whereas the blackheads are more cylindrical.
Care requirements are similar, bhp's like a little more humidity and a little warmer hot spot. As neonates bhp's are notoriously hard to get feeding. Womas not so much. Once eating however bhp's will literally eat anything you put in front of them. Both are known for being rather hardy.
If you want to see some stellar examples of bhp's check out Derek Roddy's stock. He has some beautiful womas too. Another greeter of exceptional womas is Art Aviles. There are also Facebook pages for bothers species. Black-headed pythons use, woman pythons use and aspedities keepers.
Hope this helps.
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