Oh look. One I can answer absolutely.
Super 35 film has dimensions 24.89 mm × 18.66 mm. Aps-c is 22.2 x 14.8 mm. So Aps-C is indeed smaller.
I actually checked the Aja website and they say clearly APS-C sensor size.
I'm going to guess that the super 35 comes from the aperture, which being a pl mount the aperture possibility is super 35.