Uh oh, mod bots are after me... better be quick.
WLC100 is a wattage controller, the wes51 is a temperature controller. There is a HUGE difference in both performance and price between the two (akin to a Bridgeport vs Harbor Frieght... no exaggeration). So I'd at least limit your search to include only stations with a temp control that is known to work well. The rest is icing on the cake... ergononomics, durability, tip life... you know I feel that the wes51 wins in all those categories.