Jokeware

Differences:
-I tried making him look a little less like Seb, and more like a virtual buddy.
-I made his scarf look like more of a scarf.
-Beanie is a little different in style.
-Tried making his smile less unsettling.

Browselogger:

Differences:
-Made his feet, hands, and head larger, to sorta key into the "Default Appearance" factor that his creators in his story would've done.
-His eyes are now bloodshot. (Being tied to Jokeware drives him crazy)
-His shoulderblades are sharper.
-I tried making him look more frail, with more exposed kneecaps.
-Some details are less fine for stylistic reasons.

Seb (Nab's Villain Arc)
Differences:
-Slightly different knife.
-I tried making his hoodie more tattered.
-Did some reworking to the red glow in his eye.
-Made his body proportions more like his current design.
-The red streaks in his hair are drawn differently, and look more spiky.
-If you look closely, you can see a red eyeliner. It's his flesh.