Every difference between default and Outertale sans.
For default, the spawn dialog is "It's a beautiful day outside. Birds are singing flowers are blooming... On days like these, kids like you... I forgot my line."
For Outer, the text is "Look at the stars. Are they not beautiful?"
For M1s, Sans uses a bone club.
Outer just uses his fists.
For most of the bone attacks outer's bones are glowing white.
For bones 1, outer throws stars instead of small bones. For the second hit of bones 5 he u