Love Poison and Love Poison 2 - Prequel/Sequel.
It's not strictly necessary to watch both, subtitles are a bit hard to find for season 1, but you can still enjoy season 2 easily with ENG SUB on WeTV.
1000 stars is faaaaaar more dramatic, however, both are Thai BL series that take place in countryside Thailand and all/most characters speak Thai dialect. There's plenty of green scenery as well. I recommend both if you enjoy BL and nature.
Both are Thai BL dramas. Their stories are not similar, however, both take place in countryside Thailand and most/all characters speak Thai dialect, since there are are only a few BL series that share this, I recommend both.
Thai BL dramas coming from the same company (Gr8digit) both share part of the cast, the characters come from northeastern Thailand and speak Isan dialect for the most part.