

The Perfect Body vs The Masterpiece
Gun calls Daniel "masterpiece" because he, Daniel, has still lots of room to grow. Big Daniel is not a masterpiece because he is already perfect, Gun sees the second body has a perfect body that for sure in the next eventual fight will defeat him totally.
Daniel's training progression is visible and explainable.
Big Daniel's body grows by itself without training. It is an adaptable super body. I believe that in the future ahead the last fight will be Big Daniel vs Little Daniel but this time Big Daniel won't be Daniel in U.I as he will eventually lose access to the perfect body, having a consciousness of its own. So on the final battle it will be The Masterpiece vs The Perfect Body.
Daniel will lose access to the Second Body, and then the Second Body will be someone else... perhaps the original first consciousness or a new one...
That is what I think.
Little Daniel is being prepared for that.
NOT THE SAME
There is something that clearly shows to me that Little and Big Daniels are not the same. One body is an perfect body and the other is a natural one.
There is something about the eyes, the gaze also. But perhaps its just the art style idk. Seonhui, Yuri and Jinyung seem to have a more serene and calm look on the eyes. In contrast to Sangcheol whos eyes are more confident and sure of himself.
Also there is somekind of direct connection with Big Daniel body and Sangcheol because they look way more alike than Little Daniel does to Sangcheol. In the start of lookism Daniels second body did not looked like Sangcheol but as the body became stronger and muscular it started ressembling more and more. A body that gain muscle mass without training while Daniels training with Sophia and later with Gun for a month made him even stronger. The thing is, his Second body is a continuous growing machine that grows without any long term training.
no. little Daniel is not dead.
He is alive and he will return by making a alliance with Eugene although they were previously rivals .
Expanding more on my theories
Daniel possibly being part Yamazaki.
Why I theorize this: Simply because of the U.I aspect. In the entire story of Lookism other than the Yamzaki, Daniel/Hyung-seok is the only on shown to be using the U.I
"But the U.I of Daniel and Yamazaki's aren't the same" you say, but actually it is. The ability in itself is the same but the types are different. And type I mean the way each are used. But at the end U.I is U.I. There are different types but they all have U.I. Its like using a katana. They all have a katana but each use it differently with their own combat style. Regardless of the style a katana is still a katana. Other thing is that I have been reading here and there that Daniel's U.I is different because of the eye stuff. Well no, its the same eyes all U.I users have, otherwise we couldn't know exactly who has U.I and who doesn't. White iris and black sclera. That is a clear characteristic of a U.I and also Yamazaki. SB Hyung-seok is close in controlling the U.I. Close to C.U.I. Og Hyung is still in his U.U.I (Unconscious Ultra Instinct). And interestingly SB Hyung has also the U.I ... so ...he's somehow connected to the Yamazaki's....
Yuri Park possibly being the mother.
If Seonhui can't conceive then who is Daniel's mother? Some believe that a miracle will happen and Seonhui successfully got pregnant... well ok... but that still brings the U.I dilema. Has she been pregnant by a Yamazaki male? Is Sancheol a Yamazaki in disguise? Probably not.
U.I ability is a genetic trait exclusive to the Yamazaki Clan, since Daniel has that then logically he has to be half a Yamazaki. And since Seonhui cant conceive, what about her younger sister? Actually where the hell is Yuri throughout the story we have no ideia where she is, not even a mention of where she might be. I say that she died giving birth to Daniel. And why I say that. Because when Daniel was born, his uncle is holding him crying profoundly. It looked more he was crying from sadness if you ask me. Also was Seonhui really giving birth there that day? Who knows. Yuri at some point had relations with an important Yamazaki when she was in her 25 to 28 maybe so some years has passed after the pre gen war event. Her sister Seonhui on the pre gen period should be in her 28 to 30 already. Assuming 30 years has passed she would end up being 60 if not close to 60. In counterpart Yuri in her 40's.
Manager Kim, Charles Choi, James Lee, Seonhui, Sancheol and Jinyung know the truth about Daniel/Hyung-seok
Manager Kim told Daniel/Hyung that his mother was the oldest of the three siblings. She lied there obviously to protect him and knew he would end up knowing the truth later on but it was never up to her to tell him anyways. Seonhui does not want to tell Daniel/Hyung the truth as it would hurt him alot. Imagine finding out all those years that her mother isn't really her mother but her aunt. She believes he would never forgive her. And that's exactly what is going on.
Charles Choi was the one to give a body for Daniel/Hyung-seok
Chapter 177 Charles Choi knows who Daniel is and knows about the body. And says that he(Daniel/Hyung) was wasting his gift. Was the body gifted to him by Charles Choi?! His daughter has also a perfect body... Charles Choi somehow knew how to make these bodies. But if so why would he give to Daniel?
Hyung-seok/Daniel has a twin brother theory(not mine)
Impossible. We already have seen baby Daniel being born. We never see a twin. When Jinyung, Sangcheol and Seonhui are together with baby Hyung we do not see other baby than him. So that theory is incorrect. Yuri is not on that panel also mind you.
About Sangcheol
I feel this fellow is hiding something... just a feeling.... like some type of betrayal idk...
**If Daniel/Hyung is in fact part Yamazaki he automatically becomes Gun/**Jong Geon distant or direct cousin
Gun/Jong Geon was the one to explain about the U.I and plus was the first to identify it on Daniel/Hyung.
Second body Hyung-seok
Clearly the bodies DO NOT have the same age nor height. SB Hyung is 180 (179cm to be exact) and OG Hyung has 163cm CANONICALLY post training with Sophia, on Wiki they say that he is 179 same height as SC Hyung. That is incorrect, Hyung looks shorter than his other body clearly. After training with Gun based on info he grew but not to the point on reaching SB Hyung, so if I had to give a personal height for him now, I would give 169cm to 175cm. Hyung second body remains having the same height 179cm and it never changed, so it is impossible that they are twins. SB Hyung seemed to look be older than OG Hyung. Maybe in his 22-24 years old and OG Hyung 18.
*UPDATED* Hyung-Seok Family Tree
Soooo... Seonhui cant have children huh..... interesting.
My theory on my other post still stands! I will write it again: DANIEL(HYUNG-SEOK) PARK IS HALF YAMAZAKI !