Runs out of steam?
According to fastestlaps
Ev6 0-60: 3.1
Hellcat 0-60: 3.4
Ev6 0-100: 7.5
Hellcat 0-100: 8.9
Ev6 1/4 mile: 11.4 @ 121mph
Hellcat 1/4 mile: 11.7 @ 117mph
Ev6 lateral G: 0.92
Hellcat lateral G: 0.90
Ev6 u drag: 33.80
Hellcat u drag: 36.00
The hellcat does have a higher top speed, but it seems you have to be going well over 200km/h before the hellcat would have any type of advantage.
It seems to be ahead in terms of maybe a mile long airport runway style race, but otherwise, in town acceleration, or around the track handling and braking, seems to be the edge to the ev6 GT on paper over the Durango hellcat.
Like micklebot said, it's more of a "throw more power at a regular car" type of thing rather than something built for performance for the ground up.