How absurdic it is, there is a time difference between Japanese and every other physical copy of this game, due to the boss exits. I retimed halogenlampert's 29:47 WR, my 30:03 PB and some other of my archival stuff and I calculated that Japanese physical version of the game saves around:

• 12.833 if you do Wario and Mona perfectly
• 9.200 if you get Wario's and Mona's boss stage exit as on English
• 11.267 if you do only Wario perfectly
• 10.767 if you do only Mona perfectly

Here is a list of which exit takes how much time on which version.

Edit: forgot to mention Jamie and James where you can respectively save: 2.000 and 2.200 depending on the exit you got