Both are set in Bangkok, so the setting has a very similar vibe. Although Bangkok G Story is more comedic than Gay OK Bangkok, they both still take realistic views on what it's like to be a sexually active gay man in Thailand, Bangkok where many people are still not accepting of same-sex relationships.
Recommended especially for fans of Pree and Rambo, their story and both seasons of Gay Ok Bangkok come with a good amount of angst, drama, and happy feelings. The love scenes are also more steamy and mature than your typical BL. In addition, both dramas focus on young adults in a professional, rather than school, setting.