Both are thriller/action romances with a male lead who is absolutely head over heels for the female lead.
Both are very slice of life esque dramas that don't have very high stakes. Both have loveable, cute women that mostly stand up for themselves as the lead. Along with a big cast of side characters that are all endearing in their own way.
So although Love O2O is a Chinese drama and Something About 1 Percent is a Korean drama, they both deliver on cute, fluffy relationships. I felt so good while watching both and I think if your a fan of one you're likely to like the other.