Of course your have to compare apples to apple though @HopsnFroth with saying after his $80 contract expires he'd move to a $30 phone plan + 25$ for monthly SYT basic bundle, obviously if your signing up to a $30 phone plan it's BYOD.
Why not just buy a 4.90 monthly sim to qualify for the current kogan promo https://www.ozbargain.com.au/node/333857 which would give you 16GB for around $25 a month over 13 months ...
@NickMicadon Get a dual sim phone and a kogan sim. sorted.