Have gone with Avplan purely from a service point of view as Virtually there mentioned.
I could not see much difference between the programs but when I wanted to ring someone to discuss my potential purchase as I would do with anything else, no one was home at Oz Runways!
Remember getting an email response from some kid I presume advising me to ring on such and such a number after 4pm. Did this and left a message and still waiting, six months ago.
Avplan seem to have someone answer their phone and will ring you back if the right person is not there.
Am sure if you are a young tech savvy type oz r will be fine, but if you wish to speak to a person and have some after sales service, then Avplan is your preference.
In my opinion service is the main selling point on most products/purchases, but each to their own.