I use the 10B Std for the 140 Hz point, which I need and 10B SUB does not offer. Something to keep in mind.
10B Std Selectable points:
70 Hz. 100 Hz. 140 Hz.
200 Hz. 300 Hz. 450 Hz, 700 Hz, 1 kHz,
1.4 kHz, 2kHz. 3 kHz. 4.5 kHz
10B Sub:
40 Hz, 50 Hz, 60 Hz, 70 Hz,
80 Hz, 90 Hz. 100 Hz.
200 Hz. 250 Hz. 300 Hz.
400 Hz. 500 Hz