[Australia, SE QLD] Back yard putting green turf choice – TifTuf or Iron Cutter

I am trying to decide between TifTuf and Iron Cutter for the turf to put down as my attempt at a backyard putting green.
Difficult to tell the differences between the two, they seem to be near identical, with Iron Cutter seemingly being the newer variety.
It will be surrounded by blue couch thats already there. I have glypho'd it, removed the existing dead grass, cultivated it and will be putting down a layer of USGA sand. There will be some minor contours in it.
Will be mowed one of my Scott Bonnar 45's, so theoretically can get down to 3mm HOC, but more like 4-5mm will be realistic I think.