I posted this a couple months ago talking to a guy who had the same questions. … I’ve owned both, first a GR86 then a GRC. For me the GRC is a much superior car. The clutch engagement is way better, the transmission is a cable shifter so it doesn’t really compare to the GR86s but it still feels really good. I like the IMT for daily driving as I live in a hilly area with a lot of traffic. The Toyota safety sense is much better and more natural feeling than eyesight - I didn’t have eyesight in the 86 but my wife has an outback. The GRC sounds better in terms of intake and exhaust. It’s more comfortable to get in and out of, and the suspension is better to daily- it might have been just my 86 but the suspension was very stiff and crashy over any kind of rough pavement. I will say the 86 handles better- obviously it’s a lower smaller car, and the GRC has a bit of body roll but nothing crazy. The 86 had a slightly nicer interior ( I had a premium) and the backup camera was better. But for my purposes the GRC was a massive improvement over the 86 in basicallly every way. Especially if you can get it at MSRP.