Your first option is as:
Joint Tenants – this means that upon the death of either one of you, the property will automatically pass to the surviving person (paperwork will be needed at the time of death however your partner will receive the full property upon your
death). Most married and defacto couples would choose this option.
The second option is as Tenants in Common – Tenants in Common is dealt with
by way of your Will and as to shares (example 99/1, 50/50, 60/40). This
is often used for taxpurposes, split families, brother and sister buying
a house etc.