Currently, you can find those posts in the tag about that respective character. But if you think it will be more useful, I could make a separate tag to compile all those posts. Let me know what you think!

Images from the development of Unfinished Dream of All Living Ghost have been published at touhou-project.news/news/8892/. One of them features Reimu talking to Marisa, saying:

それって冗談じゃないの？
俄然、面白くなってきたわね！

If you search for this line, it doesn’t seem to appear anywhere in Reimu’s story. If you look at the ability card, you may think this line is from VS mode since in the released version, ver. 0.01a, Narumi’s card is not available in story mode, but only in VS mode. But if you look at the lives, it indicates the dialogue is before the battle, which is only possible in story mode. There is a place in Reimu’s story where both her and Marisa have the same facial expressions as in the development picture, but the dialogue line is completely different.

Besides these, the position of the portraits also seems to have been changed in ver. 0.01a.

Although her background uses the same textures between the games, Komachi Onozuka’s spellcard background looks different in 100th Black Market than in Shoot the Bullet.

Regarding Phantasmagoria of Flower View appearance, the background of main colour palette Komachi is the same as in Shoot the Bullet, but the alternate colour palette Komachi has a different background. Please refer to /post/187302097964/ to see the difference.

Eiki Shiki’s spellcard background has been changed in Shoot the Bullet compared to Phantasmagoria of Flower View.

In Phantasmagoria of Flower View, Medicine Melancholy’s spellcard background is spinning, while in Shoot the Bullet the flower pattern is static.

The title screen from Unfinished Dream of All Living Ghost did not have the “Extra Story” and “Achievement” text grayed out in the development pictures.

For reference, the development picture was taken from touhou-project.news/news/8892/.

In 100th Black Market, Clownpiece’s name appears written as Crown Peace at the beginning of the boss fight, but Crown Piece in the top left corner during the fight.

Mai - Mystic Square (stage 4 boss).

I did not draw the pictures, I only made the collage.

Yuki - Mystic Square (stage 4 boss).

I did not draw the pictures, I only made the collage.

Toyosatomimi no Miko - Antinomy of Common Flowers additional portrait.

Miko also uses the portraits from Urban Legend in Limbo. You can view the collages with them at this post: /post/721578395958460416/.

Toyosatomimi no Miko - Urban Legend in Limbo.

I did not draw the pictures, I only made the collages.

Toyosatomimi no Miko - Hopeless Masquerade.

I did not draw the pictures, I only made the collages.

PART 2. PART 1: /post/721319121855397889/.

Toyosatomimi no Miko - Hopeless Masquerade.

I did not draw the pictures, I only made the collages.

PART 1. PART 2: /post/721319183773843456/.

Was playing Hopeless Masquerade today when I noticed a familiar pose.

I’ve already posted this thing years ago (see /post/165909714239/), but I’m making another post now to also include the game title bar. Lots of people have the impression that Kasoya ⟶ Kasodani is a change between trial version and full version.

No, she was still called Kasoya in the full version, ver. 1.00a. The name change was done in ver. 1.00b.