Yea, Ford always under-tires and under-dampens their cars for some reason unless you go with a Shelby or special edition car like the Boss 302. The Camaro in that test is the track version, the 1LE and comes with a massive tire and dampening advantage. It was designed for the track and that is where it excels. I went and test drove one before I bought my car and it's a turd everywhere except the track. Blind spots were terrible, my hair touched the ceiling, and the interior was straight out of night rider, and the ride was harsh. The plan is to go full adjustable suspension on my car so I can dial it in softer for the street and full up race stiff for the track. With proper tires and suspension the Mustang will obliterate the 1LE and be much better for day to day driving as well.
The comparison vs the 2012 was just a drag race. Ford moved to an independent rear suspension this year from a live rear axle. The IRS is heavier but will handle corners and bumps 100X better while the live axle is lighter and stronger for drag racing. The 2015 is ~100 pounds heavier but makes 15 HP and 10 TQ more so it ends up being a wash in straight line performance. I dont drag race so good riddance to live axle.
Handling is night and day better. With the stock Performance Pack setup it is about as flat as my 13 was with the full Ford Racing setup. I just swapped out the Pirelli's for Michelin Pilot Super Sports all around, next will be exhaust.
In my opinion the Rateken seems to shoot inanimate objects and the ground far more often than the other AT guns. Maybe because of the projectile type? Aim time + Setup Time + fix the projectile and I think it would be fine.