The Hobarts 2.0 should be based in the F110 but increasing the cells to 48, because F110 only has 16, the most important thing for Australia to want 3 Hobarts 2.0 more is not the cost, it is obviously the weaponry and radar, the Spy radar should be superior to Ceafar, everyone knows that, and the array of missiles you can launch for the 48 cells is wider, more complete than Hunter´s, note the Sm2 missile is antiship missile as well with quite a long range, together with Harpoon, then the Tomahawks, the antisatellite and antiballistic. The resistance of the Spy to denied electromagnetic spaces, or the ability to sustain multiple beams of power.The only argument I can see in favour of the F-110 as an alternative to some Hunters is cost. Could be cheaper to build & operate. Wouldn't be able to carry everything that's being loaded onto the Hunters, though. Maybe a GP frigate to supplement the grade A ASW Hunters.
Note that I'm not suggesting this. I'm just examining the arguments.
Hobarts 2.0 are going to be smaller than Hunters but maybe more expensive because of the radar, it has 2 hangars and 2 electric motors as well.