From the manufacturer:
 
Features & Details
 
Upgrades to Cards & Materials: "Clear Series 1" was fun - but it was a solid experience in learning the ins and outs of mastering what we can accomplish with clear cards. In "Clear Series 2", all Characters and foreground elements in illustrations will now have white ink layers to prevent any transparency in the illustrations themselves, leaving only the blank areas for a more vibrant clear experience.
 
Additionally, all SPs, SRs & Alternate Arts will now have gold foil hot stamping instead of a gold print. For example, the SPs will look similar to the gold foil stamped Parables in main sets, just - clear.
 
Upgrades to Set Distribution: "Clear Series 1" featured Alternate Arts and their Base counterparts for a total of 20 cards in the set. "Clear Series 2" will feature a total of 26 cards including Base, Gold Foil Stamped SPs of certain Parables, SRs including "Sayuri, Abyssal Empress" and "Birb!!!", and all 4 Alternate Arts from "On Sandy Shores". Additionally, bonus chases of past Alternate Arts from Keystone 2 & Keystone 3 have been added as an upgrade to the set.