Sexy and protective MLs
Cute and strong and independent FL
Both meet because of games and become a couple that way, although in 2 different ways
Falling into you Smile has a better story line, character interactions, secondary characters, OST, acting and plot overall.

I found both highly enjoyable. No annoying love triangles, villains that interfere, no stupid misunderstandings. They're awesome. Falling into your Smile is better than LOVE O2O in every aspect in my view, but I greatly enjoyed both. Wish there were more series like these 2.