I have waited to put 2000 miles on the GRC before commenting.
The GRC is a better car on paper and to own overall, in my opinion. But I miss the connected-ness of the STi. GRC is numb.
The STi steering is better. So is the shifter and awd feel on tight rutted out backroad turns in heavy acceleration. These types of backroads to get home, and the STi felt better, more connected, and stout.
The STi was a dog though. Too bloated and felt heavy. I like the GRC more overall for my needs right now, but I find myself jumping in to the miata from time to time now. More than I did when the STi was in the garage.
All good. Happy to experience them all. Wish I could keep them all too.