Ford has made improvements to the manual trans
. The clutch was revised along with some bearings and shift feel.
In the engine, forged rods, and new better flowing heads. 435 hp, up from 420. torque is up from 390 to 400.
In the suspension of course the IRS, and a revised front suspension.
The interior is much improved over the outgoing '14.
I'm sure there is more I did not list but that's off the top of my head.