100EV margin is an average victory.
300+ EV margin is more like Landslide territory.
We haven’t seen any like that since 1984. From 1928 to 1984 it was rare to not have a landslide - just 1948, 1960, 1968, and 1976 were not landslides while 1928, 1932, 1936, 1940, 1944, 1952, 1956, 1964, 1972, 1980, and 1984 were landslides.