Here is oozaru levels

Oozaru

Saiyans can turn Oozaru when they look to a full moon. Their strength and energy increase 10 times, but everything depends on the tail: in fact, if this one is missed, the transformation cannot take place. Not all the Saiyans can control themselves when they turn Ohzaru... Goku, for exemple, completely loses consciousness!
The ones who reach this level are: Bardock, Son Goku, Son Gohan and Vegeta (and all the other Saiyans with tail)

Golden Oozaru

it's preatty much like the normal Oozaru... but his hair is golden! This level is reached for the first time by Goku during the fight against Baby-Vegeta on Planet Plant. Also for this transformation the tail is required; that's for this reason that and Baby-Vegeta and Vegeta (who do not have the tail anymore) reach this level just thanks to the device made by Bulma.
The ones who reach this level are: Son Goku, Baby-Vegeta and Vegeta.