Hosting
10 S3s, plus PSUs, lots of cabling, non-standard design
1 SP30, 1 network cable, 1 power cord, standard rack design

Advantage: SP30



For data center deployment, the SP30 is the flat out winner.  The standard rack design works very well with high-density cabinets.  There's only a single machine with a power cable and a network cable.  The data center only needs to worry about managing a single IP address and providing remote access to the web-based configuration interface and direct SSH access can be controlled easily.