There is no difference in the rating change between resignation, and checkmate.
resignation

what if somebody runs out of time? ive been winning a bit
won twice on a 1400 rating who ran out of time both games. was it unrated?
what if somebody runs out of time? ive been winning a bit
won twice on a 1400 rating who ran out of time both games. was it unrated?
why do i not get any rating when somebody resigns