Some titles that I'm personally interested in and/or already own (taken from the AU PS Store, thus all in AUD):
- AI: THE SOMNIUM FILES (was $84.95) $39.95
- AKIBA'S TRIP: Undead and Undressed (was $47.95) $6.71
- BLAZBLUE CENTRALFICTION (was $77.95) $13.45
- DATE A LIVE: Rio Reincarnation (was $39.95) $17.95
- Death end reQuest (was $39.95) $17.95
- Dragon's Dogma: Dark Arisen (was $30.95) $13.95
- God Eater 3 (was $99.95) $30.95
- Our World Is Ended. (was $69.95) $17.95
- Phoenix Wright: Ace Attorney Trilogy (was $44.95) $17.95
- Root Letter: Last Answer (was $39.95) $13.45
- Shining Resonance Refrain (was $47.95) $17.95
- SOULCALIBUR VI (was $99.95) $24.95
- Spirit Hunter: Death Mark (was $69.95) $24.95
- Spirit Hunter: NG (was $69.95) $30.95
- Utawarerumono: Deception and Truth Bundle (was $69.95) $15.95
For the most part, given the current AU/US exchange rates, the Australian PS Store will give you slightly better prices. In some cases, it's utterly ridiculous, for example Akiba's Trip: Undead and Undressed is $6.71 AUD, while it's $8.99 USD (~$14 AUD) in the US PS Store.
On the other hand, there are also examples like Persona Dancing: Endless Night Collection, where it's $54.95 AUD, while it's only $21.99 USD (~$35 AUD) in the US PS Store.
So for the best prices, double check the individual availability and price of the game you're interested in on both:
And maybe even the PS Stores of other regions, to see which store has that particular game cheaper.
See also:
[PS4] Catherine: Full Body ($30.95 or $25.95 with PS+) @ PlayStation Store AU
[PS4] The Yakuza Remastered Collection - $62.95 @ PlayStation Store
Great effort with the links and price formatting :)