People generally say VPI is the best axanthic line. They sell for more money and have a higher demand in the ball python market. I chose to purchase only VPI axanthics a few years ago for this reason.

There are good examples of each line though, but VPI is my pick because the different lines have not proven to be compatible, and I wanted the best I could afford.

As for browning out... it's important what other morph goes INTO the Axanthic. Complimentary axanthic morphs like lesser, fire/sulfur, etc will be good because those morphs stay lighter into adulthood, rather than darkening up.