Models also known as Trim Levels, are used to identify a vehicle's level of equipment or special features.
The 2015 Cadillac XTS has an average owner rating of 4.33 out of 5 which ranks it #6 of 11 other Luxury Large Cars.
From the Vehicle History blog
Overall
Front
Rollover
Side
Moderate Overlap Front
Side
Roof Strength
Driver-side Overlap Front