tbh I stopped reading the manga awhile ago. I think by that point I had just gotten off of re-reading Bakuman, so I was kind of burned out at that point (I was in the middle of the arc where they go to Kyoto when I stopped)
As for why I like Rizumo more, a few reasons I guess. The early interactions between the two were just really enjoyable and great (the whole shirt thing and then when she sat next to him on the train). Admittedly, a big part of it is because Izumo is my favorite character (anything fox themed immediately has my undying love).

I think about this scene sometimes and it makes me happy every time.