Sorry dude. Actual specs show the Golf has more interior room front and especially rear. The Stinger is wider, giving it its only advantage cabin-wise. Tall people will feel cramped in the Stinger, not so in the Golf, where a 6'5" guy fits comfortably and I have had three adults (including my 6'4" brother-in-law) in the back of my GTI and R and he had room. In the Stinger? Nope.
Plus, you can put a nuke in the boot of your Golf. Not so in the Stinger. Golf has more interior usable space even though the Stinger is longer and wider by quite a bit. Interior, ease of use of controls...the Golf. Putter around the neighborhood without pissing off the neighbors? The Golf.
Rob a bank and fade into traffic? The Golf.
The Golf has the MQB chassis, the singularly best mass-produced chassis out there and has proven time and again to give a more controlled, comfortable ride than anything in its class and lost of stuff not. Plus the Golf has excellent site lines and visibility, while the KIA has them from a Camaro, only worse, making the Golf easier on the brain to drive in traffic. Seeing out of a vehicle, it turns out, is really important.
Additionally, with the VW you get 37 more HP and 20 lbs more torque in the comparable 2.0 turbos in the base Stinger and the Golf R.
The Golf has a superior safety rating in everything. Personally, I took a 65 MPH t-bone right in the driver's door on my (now dead) GTI and only got a charlie horse. Zero injuries. Bent the entire B pillar in and crushed the driver's door. You'd be a victim in the KIA.
There's a reason why the Golf is THE hot hatch King. Plus, you can transport a brain in a Golf and deliver it in one piece, without catching the brakes on fire down a twisty road (suck it Ford Fuckus).
There's a reason why ALL Golfs have been on the Car and Driver Top Ten List for 11 years running, now.
KIA? ...oh...not on the list. Anywhere.
Golf R. Winner.
PS: I've been 'rolled on' by the V6 Stinger owned by one of the soldiers down here at Ft Benning. When he caught up with me...he was pissed he'd bought the Stinger. "But I beat...some Dodge, some Chevy..." I had to explain power to weight. My R, which cost less than his Stinger even WITH my mods (APR Stage 2 425WHP/450LBFTTQ), has every advantage over the Stinger. "My friend told me to check out the R," was the last thing he said. I still told him the Stinger looked good and gave him the "...different strokes for..." out. Be humble in victory, my Father always told me.
I'm waiting to lose. The guy with the Lambo lives here won't race me. There's always someone faster. I learned that when I went to Houston and hung out with the Supra crowd.
Oh yeah...plus: Wolfsburg. What do you have? Oh yeah: Yeongdeungpo. I think that's pronounced You on dung poo? Winner: VW