That's the first week since launched it's sold more on PS4.
Week 14:
18./16. [NSW] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 3,161 / 31,999
19./17. [PS4] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 3,061 / 28,652
Week 13:
16./05. [NSW] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 5,244 / 28,838
17./07. [PS4] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 4,722 / 25,591
Week 12:
05./00. [NSW] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 23,594 / NEW
07./00. [PS4] Chocobo's Mystery Dungeon: Every Buddy! (Square Enix) {2019.03.20} – 20,869 / NEW
So no, it doesn't have better legs. In fact, neither does the Switch version. The two have been selling pretty much the same every week, if you don't take into account statistical noise (which is the first time this is happening with multiplat releases).