basically the difference is minimal, if you go for voluntary repo you call the tune, you say when the process begins.
But we also have a certain degree of control if you choose to allow the lender to follow due process, in that we know that there are procedures the lender must follow and we know that, following the 1st months mortgage/secured loan arrears, the process takes a minimum 6 months and may take a year depending on how proactive the lender wants to be.