I feel there are many similarities between these 2 dramas. Both have successful actor and a rising actor as male leads. And I feel like there are other similarities.
Both are Thai BL dramas about the entertainment industry and red flag love interest. In Top Form, both main leads are actors that are lovers to rivals while in My Stand-In, one main lead is a stuntman/aspiring actor and the other is a model/buisnessman in the industry.
Both Thai BL dramas are about rival actors in the entertainment industry that goes from rivals to lovers route. Both series also have some dark and red flag moments. However, Reset has a supernatural reincarnation element as well.
