There are different types of WRX’s, and a slight difference in how they are named in Canada and the USA.
The WRX is of course from the Impreza family.
In Canada There are 3 types for WRX’s: GT, 265, and STI, while in the US, the GT is classified as an Impreza and WRX’s are only classified as WRX (265) and STI
The GT is a 228 HP engines, the 265 (WRX) is obviously 265 HP, while the STI is the super crazy ride at 305 HP.