Don't knock it until you've tried it. Stock for stock, the 13-14 had shorter stopping distances. Will it make a difference on the street, no, probably not. Will it do a better job stopping the car from 185 mph at the Texas Mile, you betcha. I went with upgraded rotors and pads on the 4 piston setup and it's no match for 6 piston setup. It's all about rotor diameter.
No one knocked anything. I think my comment was clear, I'm not discussing the Texas mile I'm talking about the street. A lot of people find these threads and comments and assume they need the bigger more expensive stuff and it'll be great because the internet said so. Just like what we see with the GT350 brakes, its bigger so it must be better.
This was my experience and now I see why its so confusing, so I wanted to clear things up.
We can discuss more regarding different use cases and where someone might benefit but its gonna be very close and depend on the preference of the person rather than hard recommendations.