Thank you for contacting us in regards to your future purchase of one of our Connected Devices. One is not really "better" than the other. I would recommend checking out the link below to help you choose which Connected Device you want to purchase and that will best suit your needs:
The Sling Moderation Team
I think Archie could have done a better job with my answer. For those of you considering the purchase of a used WD Media so that you can play your slingbox on a connected device, DO NOT buy a WD TV Live HD Media Player or a WD TV Live Plus HD Media Player. They are NOT COMPATIBLE with the slingbox.
You must buy either a WD TV Live Hub Media Center or a WD TV Live Streaming Media Center
Otherwise you are SOL. I learned this the hard way. Thanks Archie