You dont have the exposed plate screws like the north american switchplates, Australian ones have a shroud that clips on/off and covers up the mounting screws for a neater finish. (Mounting screws are all flat/posidrive combo heads, so you can use a drill to take them on and off.)
I’ve never experienced the recessed circles collecting more dust than blowing a single deep breath would solve. And I’ve never even seen any grime in them. I suppose of you used it outside, but every type would get grimy that way.
I think I would like Australia’s over the rest.
The recessed circles I feel like they would gather dust and grime in there if you don’t use it often and be tough to clean out.
I like the angles prongs as well as the switch to turn it off and on.
You dont have the exposed plate screws like the north american switchplates, Australian ones have a shroud that clips on/off and covers up the mounting screws for a neater finish. (Mounting screws are all flat/posidrive combo heads, so you can use a drill to take them on and off.)

I’ve never experienced the recessed circles collecting more dust than blowing a single deep breath would solve. And I’ve never even seen any grime in them. I suppose of you used it outside, but every type would get grimy that way.