Guessing the "hot version" is the one with the giant spoiler and body kit. Didn't see an intercooler on that in any of the pics so it's probably a tuned version of the N/A FB engine.
Wasn't there a quote from one of the engineers a while back saying they could easily get 230ps out of this engine but they were tuning it for more fuel economy? The hot version is probably just tuned more for performance.
http://www.ft86club.com/forums/showp...03&postcount=2
"Subaru 2 Liter Boxer Engine's Mark Performance is 230ps, but I feel that this number is bit greedy. If we can hold the car's weight to 1200kg (2645 lbs), 180~200ps should be plenty of power"
230-250ps in a high revving NA FB would be awesome assuming the weight of 1200kg.
AFAIK they haven't completed testing of turbo FB engines and that is why the next gen STi impreza's have been delayed, right? Maybe ichitaka could provide more info on that.