You might make parallels with this and 100 girlfriends. The key differences lie in humor style.
Girlfriend and girlfriend is, stay with me on this, more "realistic" on its approach with heavy quotations. The characters personality are akin to the excessive shouting this author gravitates. Very pronounced. MC is super honest. Girlfriend 1 is super high strung. Girlfriend 2 is super dedicated. But outside of that, they do talk about their relationship and encounter various stepping stones seemingly expected of consensual two timing; handled comedically of course.
100 kanojo isn't afraid to get meta and quirky. Like, supernatural levels of quirk. Relationship problems don't seem to be the major issue as the Girlfriends basically accept the mc getting more. I would say the personalities take unique to another level on a few characters too, such as a girl who exclusively speaks by text to speech.