using vDS or vSS would be the same when it comes to redundancy, it all depends on how many NICs you have to play with to how you would configure it, like having a single vDS with all NICs assigned and then manage the port groups. Or have 2 vDS one for management one for VM with the NICs split between them. But for proper redundancy you will also require not only additional NICs but make sure that the NICs go off to different switches. if both NICs go into the same switch then the network isn't redundant while it protects against physical NIC failure if the switch goes down then its all lost.

Its all relative to what you want to protect against and the budget you have.

Cheers