Vector or Hastur?

Since purchasing the Sapor RDA, I'm looking at adding a couple more top airflow RDA's to my collection. I'm looking at a price point of $30 and trying to decide between the Vector and the Hastur. The Vector drip tip is not an issue for me as it's very similar to the Thunderstorm drip tip, which I love. Any suggestions as to which one I should get?

Also, does anyone know if the Vector at viper-vape.com is an authentic? The listing seems to imply so.