I test drove both cars, and the base WRX felt better in every way—shifting, handling, and braking. I think the WRX has a slightly wider wheelbase. I paid $28k MSRP, while the GR was almost $50k. The WRX looks sportier, whereas the Corolla resembles a Yaris, which I find unattractive.
In terms of performance, while the GR Corolla might be faster or have more horsepower than a base WRX, the WRX can be upgraded. With the price difference between the $28k WRX and the $50k GR, there are many options to increase the WRX’s horsepower.
The GR Corolla has 3 cylinders, which might not bother some people, but I feel there’s a stigma with 3-cylinder cars. The WRX has more displacement than the GR, with 49.9% more—4 cylinders versus 3.
Another issue with the GR is its horsepower-to-liter ratio. It has 100hp per cylinder, which, in my mind, isn’t reliable.
In my eyes GR is something toyota slapped together, to make quick buck. Restrictive warrenty. Engine thats already maxed out.