if the article in Q is the UK tuner's STi Type 25, that is indeed based on a JDM STi Type-RA Spec-C (currently the quickest factory car in Japan, competition inc. Evos, GT-Rs, NSX-Rs, etc). Converted with the JDM 2.5 as mentioned above, would be an awesome combo. JDM and the rest of the world for now are sticking with the 2.0 boxer, which is a higher revving engine, feels more race-car like in my own opinion. The Type-25 has been reviewed by a few UK mags, very worthwhile read.