More powerful Mitsubishi EVO X MR and lighter Impreza WRX STi spec C are coming later this year.
Subaru Impreza WRX STi spec C will be more focused on weight reduction: Lighter roof, aluminium boot, smaller fuel tank, thiner and lighter glass, smaller battery. All this will reduce weight for about 70kg to 1400kg. We can expect minimal power increase.
Mitsubishi Lancer EVO X MR(Mitsubishi Racing) will have 20hp more, around 305hp, similar to standard Impreza STi plus revised aero pack like rear spoiler, side skirts and front bumper.