I’ve removed these tags, thank you for pointing that out.
I loaded the existing address data into JOSM and it looks like the majority of existing addresses were added by the Annon Paper Delivery team as they don’t exist in this dataset. Seems to be mainly units in retirement villages. There’s also this patch of addresses that seems to be a mini import of this dataset, as their positions perfectly match up.
Excluding that, there’s not many addresses, but the two sources seem to match up. It also matches up with a little on the ground address mapping I did a while ago. Seems to be pretty high quality.