Supra. I’m sure the Yaris is fantastic to drive but I feel like the Supra would be easier to live with. Also there’s the fact that you tell people you have a Supra vs. telling them you have a Yaris lol. In all seriousness though, I think the GR Yaris is a tad overpriced and I’m not a fan of the looks.
I'm going to expand on my answer. When you pull up in a GR Supra, people know you have a badass car. But when you show up in a GR Yaris that can take out 90% of all the other cars there, you're not just looking badass. You ARE badass.