Its debatable, especially in this world of Jeskai Nahiri and the subsequent increase in anti-planeswalker cards
Osaka is a place to eat, eat, eat, with local specialties like takoyaki, okonomiyaki, and kushi-katsu, and for extra fun, it's home to Universal Studios Japan
While basically all blue decks were either Treasure Cruise decks or Dig Through Time decks, there was definitely a wide variety among those
Right now, the foil Full-Art Showcase price tags for the six mythic Gods looks like this: Heliod, Sun-Crowned $35 Thassa, Deep-Dwelling $30 Klothys, God of Destiny $20 Erebos, Bleak-Hearted $15 Nylea, Keen-Eyed $15 Purphoros, Bronze-Blooded $15 The only halfway-reasonable comparison I can make across these two sets is with the two Showcase mythic rares in Throne of Eldrane
Since several of these cards are already out of stock, expect their market prices to change dramatically over time