All disparity:
underscore _ (95 0x5f) vs. parenleft ( (40 0x28)
The top 25 disparities between the original kerning and Autokern's kerning, in descending order.
Original
The original kerning from the input.
underscore (0x5F) lsb: 36.0
underscore (0x5F) rsb: 36.0
underscore (0x5F) right x-extrema: 555.0
underscore (0x5F) x-advance: 591
parenleft (0x28) lsb: 32.0
parenleft (0x28) rsb: 20.0
underscore (0x28) right x-extrema: 254.0
Original kerning value: 0.000 em
Original kerned x-advance: 0.591 em
Original x-extrema offset: 0.068 em
Original in-ascender x-extrema overlap: None
Autokern
underscore (0x5F) lsb: 8.0
underscore (0x5F) rsb: 9.0
underscore (0x5F) right x-extrema: 527.0
underscore (0x5F) x-advance: 536
parenleft (0x28) lsb: 9.0
parenleft (0x28) rsb: -1.0
underscore (0x28) right x-extrema: 231.0
Autokern kerning value: -0.067 em
Autokern kerned x-advance: 0.469 em
Autokern x-extrema overlap: 0.049 em
Autokern in-ascender x-extrema overlap: None