1. In both dramas the ML starts out with some sort of impairment. In Crush ML is blind and in Smile Code ML has alexithymia.
2. FL falls first in both dramas.
3. In both dramas the ML is insecure about their impairment that puts a strain on the relationship.

I just get the same feeling in Smile Code that I did with Crush.

Both dramas are set in a school setting. The only real similarity is studying a medical major in college but in "First Love" only the FL is doing so. I got the same cutesy feeling I got from "All I want for love is you" in this drama as well.