Some data from the latest comparison (take with a grain of salt):

Max speed on the straight
P1 - 160.076 mph
LaFerrari - 159.799 mph
918 - 157.698 mph

Max Cornering
918 - 1.29 g
P1 - 1.26 g
LaFerrari - 1.24 g

Max breaking
918 - 1.49 g
P1 - 1.46
LaFerrari - 1.38 g