Ziella 24-Dec-17 04:01 PM
0:11 - An early version of the hallway outside the nurses office can be seen. It's slightly longer then in the final and it appears to be missing a the stairs to the second floor. The textures used are different and the Nurses office isn't being blocked off by Keep out tape during chapter 1. (UI is different because the screenshot was taken in the prolouge instead of chapter 1)(edited)
Final:
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0:16 - An early version of the door to despair can be seen. Instead of being a large double door, it was a smaller single door which appears to have a sign that says "HopELesS".
Final:
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0:15 - The UI is slightly different when in a conversation with someone.
Final:
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0:17 - Early Celestia sprite.
Final:
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0:21 - When Makoto speaks, his mugshot is on the right hand side. In the final, mugshots are always on the left unless monokuma is speaking. Also more Early sprites.(edited)
Final:
Ziella 24-Dec-17 04:47 PM
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0:27 - Early "Sore wa chigau yo!"
Final:
Ziella 24-Dec-17 05:02 PM
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0:34 - Monokuma's execution button looks like a PSP but doesn't in the final.
Final:
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0:37 - There is more shading on leons face in the final.
Final:
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0:38 - All the characters apart from Leon are still using their distrust sprites and the execution is still in the area from the Distrust execution.
Final:
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0:32 - Climax Reasoning for an Unused Case where Junko is the victim.(edited)
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Ziella 24-Dec-17 07:01 PM
0:32 - The makoto sprite in the background of hangman gambit was changed since his normal sprites were changed too. There was also a slight UI change.(edited)
Final:
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0:28 - Monokuma's seat was redesigned. Also Monokuma always sits when he is on his chair in the final game.
Final:
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0:15 - Early Leon and Sayaka sprites. Also an early classroom not seen in the final(?).(edited)
Final (Leon Sprite:
Final (Sayaka Sprite):
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0:09 - Early Classroom.(edited)
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0:25 - 0:29 - Early Nonstop Debate Mugshots
Ziella 24-Dec-17 07:53 PM
Final:
Ziella 13-Jan-18 10:32 AM
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0:21 - Sayaka and Hifumi can been seen alive despite it sayings it's Case 6 and Sayaka dying before she even gets to be in one. This however is most likely to avoid spoilers.
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0:52 - The cutscene that plays when you start a new game was rerendered before the final release.
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Links:
https://tcrf.net/Danganronpa:KibounoGakuentoZetsubounoKoukousei(PlayStationPortable)#EarlyDesigns
Through out the video, early versions of sprites can be seen and are still in the games files so a comparison can be found here on TCRF.

https://tcrf.net/Danganronpa:KibounoGakuentoZetsubounoKoukousei(PlayStationPortable)#ScrappedMurderCase
https://tcrf.net/Danganronpa:
KibounoGakuentoZetsubounoKoukousei(PlayStationPortable)#ScrappedMurderCase_2
Files and text for the Scrapped Murder Case seen in the trailer also exist.