The main difference is the amount of peripherals each unit can support based on power draw. A 230 watt station is rated to safely handle 110, more watts than the 120W. It's not just the power brick, but internal robustness.
CorkyG - Tucson, AZ
"Ineptocracy- a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers." - Merritt Man, 2011