The Type S appears to have no warning feature, no boost lowering when warning level is hit, no peak boost storage and no display and looks to be about the same price on ebay, why would you want to use it instead of the B spec 2?
I just installed the profec B spec 2 and have driven a couple times, it works very well IMHO. Being able to tweak the boost setting from in the car while driving is very nice along with it displaying/storing the peak boost reached during a blast. Boost was basically dead on during WOT runs I made. A gain adjustment is great along with a start boost setting in which the WG will see no pressure until this value is reached so your spoolup based on WG control will be the best it can get.