Okay, with two requests regarding the fourth generation Impreza, I would have expected some change to have been made...
Instead of model-year nomenclature, I think it would be SO MUCH EASIER if chassis designations were indicated, as the WRX and WRX STI (based off of the 3rd generation Impreza) overlap with the production of the 4th generation Impreza.
Model years 2012 to 2014 is where the huge confusion begins, as both WRX/WRX STI (3rd gen) and 4th gen Impreza (including the GP chassis Subaru XV "Crosstrek") are produced at the same time.
Unless changes are implemented soon, things are going to get more confusing. Please make a change to it so that those looking for information regarding the GJ/GP (4th gen) Impreza won't be mixing up information with GR/GV (3rd gen WRX/WRX STI sedan and hatch)...
And for clarification:
3rd generation Impreza chassis:
GE = Impreza sedan, non-widebody
GH = Impreza hatch, non-widebody
GR = Impreza WRX (from 2011-2014), Impreza WRX STI (all years), widebody hatch
GV = Impreza WRX (from 2011-2014), Impreza WRX STI (2011-2014), widebody sedan
4th generation Impreza chassis:
GJ = Impreza sedan
GP = Impreza hatch, includes XV Crosstrek
WRX and WRX STI are yet to be released in 4th generation form