I’d expect they are just messing with different error correction. I wrote a breakdown of what the Melbourne community stations did here, in short though, by sacrificing coverage slightly, you can broadcast more in the same amount of spectrum. A post in the Car Radio thread mentions that Hope/Inspire/2SER use EEP-4A - so that would likely make it:
2MFM Muslim DR 32 - 24CU EEP-3A
Hope 1032 128 - 64CU EEP-4A
2SER 107.3 64 - 32CU EEP-4A
Inspire Digital 48 - 24CU EEP-4A
FBi Radio 64 - 48CU EEP-3A
Table 336 = 192CU = 2/9ths