The $2000 Big Horn package in 2016 added basically the Luxury and Remote Start groups to the base SLT along with the auto transfer case and some chrome bits. Model years may vary. You may not have been able to get the same Lux package on a SLT. Otherwise I don't think anything is unique here except the badge, its just a nice package of options. A value if these options were what you were looking for.
LED Bed Lighting
Uconnect® 8.4
20-Inch x 8.0-Inch Aluminum Chrome Clad Wheels
P275/60R20 BSW All Season Tires
Class IV Receiver Hitch
Fog Lamps
Dual Rear Exhaust with Bright Tips
Cloth 40 / 20 / 40 Premium Bench Seat
Power 10-Way Driver Seat
Electric Shift-On-Demand Transfer Case
Navigation-Capable Radio
7-Inch Multi-View Cluster
Leather-Wrapped Steering Wheel
Steering Wheel Mounted Audio Controls
Power Heated Mirrors with Power Fold- Away
Auto-Dimming Exterior Mirror
Exterior Mirrors with Courtesy Lamps
Auto-Dimming Rearview Mirror w/ Microphone
Sun Visors with Illuminated Vanity Mirrors
ParkViewTM Rear Back-Up Camera
Overhead Console with Garage Door Opener
115-Volt Auxiliary Power Outlet
Media Hub (SD, USB, Aux)
Remote Start System (N/A Manual Transmission)
Security Alarm