Models also known as Trim Levels, are used to identify a vehicle's level of equipment or special features.
The 2016 Cadillac ATS has an average owner rating of 4.50 out of 5 which ranks it #12 of 19 other Luxury Small Cars.
From the Vehicle History blog
Overall
Front
Rollover
Side
Moderate Overlap Front
Side
Roof Strength
Driver-side Overlap Front