ok, in my knowledge
4G63 engine started back in mid eighties as a SOHC 12 valve 2.0 carb serving Mistubishi Galant Super Saloon (for E12 1986 and E33). E33 also has a GTi 16V version, with uprated 4G63 including the use of ECIMULTI, DOHC and 16V producing roughly 145bhp. at the same time Galant VR4 was introduced as homologation to enter WRC. this one has Turbocharger with it and produced around 200bhp.
when Mistubishi decided to use Lancer for WRC instead of Galant, they created an evolved version called the Evolution. using same engine but power up to around 220bhp. EvoII has 250bhp while EvoIII has 280bhp and it has been agreed between Japanese goverment and car manufacturers that they produced no more than 280bhp even though capable of.
as for 4G63, it has 2 versions either Cyclone or ECI. I heard the Cyclone is slightly more powerful in standard form (no additional modification).