There are several variables in the CommInsure product that may not work for you depending on your current flying job.
For example
CommInsure:
Eligibility
•Australian citizen residing permanently in Australia.
•Employed by a recognised fixed schedule commercial fare paying passenger airline operating within Australia.
•Holds an Australian Airline Transport Licence (Pilots) or Australian Flight Engineer Licence (Flight Engineers).
•Copy of current Civil Aviation Safety Authority (CASA) medical examination and any additional tests or reports.
MBF:
ELIGIBILITY
(a)
Membership of, and the right to receive benefits paid out of the assets of, the Fund is subject to the following requirements:
applicants and Members must be members of the Australian Federation of Air Pilots
(ii) an applicant must:
(a) hold a commercial pilot’s licence or higher
(b) hold an Australian Class 1 Medical Certificate; and
(c) be aged less than fifty years.
(iii) applicants and Members must derive their principal source of income from piloting activities;
(iv) Except for those Members who were resident outside of Australia as at 9 October 2010,
all applicants and Members must be either:
resident in Australia; or
Australian citizens,
So it is easier to get into the MBF than CommInsure, and it covers GA (including Ag) where as CommInsure does not.
As for the Money side of things it would be a bit hard to compare apples with apples here as they offer two slightly different products.
The MBF has given it a go however with the following PDFs
http://www.aapmbf.com.au/content/AAP...Electronic.pdf
http://www.aapmbf.com.au/content/AAP...Electronic.pdf