Both dramas explore the relationship between social media and real life in Japan.
DIFFERENCES:
F = female lead is primary character
FSO = male lead is primary character
F = context is artistic (both high end and grass roots) with protagonist impacted by "anonymous masses" of responses
FSO = context is school friends impacted by an individual/malicious hacker
F = tagged as friendship, romance, life
FSO = tagged as suspense, thriller