Intel® Core™ i5-4210H Processor (3M Cache, up to 3.50 GHz) quick reference with specifications, features, and technologies.
Making sure your ram works in dual channel (2 x8 = 16GB) let's everything run just a bit more fluent.
An SSD as bootdisk is also highly recommended.
For both upgrades it is difficult to say how much faster things are, but you will absolutely notice them.
Added a PQI My Lockey usb fingerprint reader for Windows Hello.
Love the large (17,3") matte IPS display and the backlit keyboard.
Those are things I would look for should I buy another laptop.