From memory, Polar white is a slightly creamy white and Pearl white is a greyish-white.
The difficulty with Australian-made VWs such as yours is that overseas VW colours and codes don't apply. The Australian factory in Melbourne was supplied by BALM (British Australian Lead Manufacturers), who became part of Dulux in the 1960s. All Australian colours came with a BALM/Dulux number, which can be found in their catalogues and colour cards of the time. After 1961, by which time Aussie VWs were fully manufactured (rather than just assembled from German parts as before), the colours also had a Volkswagen Australia colour number. These were a different format from VW colour numbers used in Germany. The colour name and code was printed on a small sticker, placed on the body next to the brake reservoir.
1962's Australian white was Nimbus White, which was BALM 9828 (VW 1.2.900). In 1963 this was replaced by Pearl White (BALM 4927, VW 1.3.003). Australian new model changes were made in the early months of the year, NOT the previous August as Germany did.
Another white was added for 1964, Polar White (BALM 6030, VW 1.3.903). Polar White was listed for 1963/64, and 1965/66, while Pearl White was only listed for 1963. It's therefore more probable that your car is Polar White.
For 1967, the last full year of local manufacture, the new white was Lotus White (Dulux 01290, VW 909). This was a much creamier white that carried over onto the CKD-assembled big-window '68 and '69 Beetles. From 1970 the fridge-like Antarctica White (Dulux 12330, VW 911) was used, but it was actually a Nissan colour.
One other thing - the Australian Pearl White is NOT the same as the equivalent US-Euro Pearl White, seen here only on fully imported Karmann Ghias. German Pearl White was BALM 4804, VW L87.
A comprehensive list of Australian VW paint colours is here:
http://www.clubvw.org.au/vwpaint
