I'm probably more sensible online and a little more PC. I have a lot more confidence in being overly honest and getting away with it IRL.
Freude, schöner Götterfunken Tochter aus Elysium, Wir betreten feuertrunken, Himmlische, dein Heiligtum! Deine Zauber binden wieder Was die Mode streng geteilt; Alle Menschen werden Brüder, Wo dein sanfter Flügel weilt.
I am more "generaly" social offline, but much less personal, except for those I am close with.
Online I tend to be more personal, but a lot of my social qualities don't come through.
In real life I am somewhat random, quirky and quick witted.
Online I have the luxury of taking my time to respond and carfeully mesauring my words (which I don't always do in spite of the luxury)
Also, although I am a decent writer and writting does help me collect my thoughts, I am much more organized verbally than written.
I'm generally more outspoken and much more formal online than I am in real life. I tend to get tongue-tied and rambly in real life, whereas I put a lot of thought and revision into almost everything online.
I'm much more stiff and colder (not very complimentary, affectionate, welcoming...pretty closed off and guarded) in real life. However, online I show my true colors a bit which also includes my insane insecurities.