The Tubular X Knit is Primeknit, check out the description on ADC:
http://www.adidas.com/us/tubular-x-knit-shoes/S81674.html
I also chatted with a "Lifestyle Expert" on ADC who said the Premiums are the same shoe as the Knits, just in different colorways like Sesame:
Confusing, but that...