NGNL is still on-going but both have the trifecta of female friendships and dealing with each character's romantic relationships.

Green mother's club has a darker vibe and plot points/conflicts but similarilities in regards to multiple female leads and female-centred struggles.

Super cute and funny, same kind of hilarious but sweet vibes.
There are character differences in regards to ML in weightlifting fairy being more playful, but that heartwarming, hilarious hijinks feel is similar.