The difference between the Undertale version and the Deltarune version is the "m"(lowercase) spacing and "y"(lowercase) spacing.
This is Comic Sans MS scaled to 10px. (obviously)
This is 100% accurate, I'm not joking.
Comiaster Font.
A Mix Between Comic Sans & Aster Font.
(New 2024).
By : Mohammed (Baldi Mister).