I have a Stinger GT2, the wife has a 2018 Honda Sport 2.0T.
The Honda is a great car, it's fun to drive, but it is FWD. Do I need say more? I hate FWD, but other than that it's a blast to drive. It's quick but I spin the tires way too much. Every time I punch it (very often) it lights the tires. The 10speed keeps you in torque, it's not a slow car by any means. It's huge.
This Honda is a great car, rides great, pleasant on hi way, but it's FWD. I much prefer my Stinger, did I mention how much I hate FWD on cars? We both traded BMWs in on our cars, we are both happy.
We ended up with this Honda Sport 2.0t for a tad over $26k. It's a hell of a lotta car for that price, but the Stinger is a more refined car (my opinion). Both are great cars, both are different, but FWD? That is huge. But the Honda was $200 per month less than her equivalent BMW (328i). Her BMW got much better MPG, due to us running the poor Honda harder.
Many people love these Hondas, and Hondata (and others) offer tunes that'll add a lotta torque and HP, but it'll just spin the tires more.
Is the Stinger 2.0 a better car? Time will tell. It really is apples to oranges, but I can drive both every day to see the differences. Both are great cars, if the Stinger compares in 10 years- then we'll know.
I prefer RWD (and my V6), but there is a reason Honda sells millions of these. I much preferred this Accord after driving the Toyotas, Mazdas, Fords, Chevys, etc... at her price point. The 2.0t Honda engine is impressive, I don't know anything about Kias 2.0t.
This is another case where either/or determines you'll end up with a good car. You need to drive them back-to-back, it's you who'll make the payments. I know which one I'd chose, get the one you want- get the car you want.