That Cadillac ranked ahead of some BMW
and Mercedes models and stacks up well against the others:
https://cars.usnews.com/cars-trucks/rankings/luxury-large-cars
Autotrader's Advice
To us, the 2016 Cadillac CTS offers a few advantages over the 2016 BMW 5 Series. Yes, many items are roughly identical, like handling and performance, reliability, safety equipment and technology, but the CTS's base price ($46,600) is around $4,500 cheaper than an entry-level 5 Series, which starts around $51,000 with shipping, a price difference that continues up through both models' trim levels. We think the Cadillac also offers more modern styling compared to the BMW's aging design, and we love the CTS's available magnetic ride-control suspension. We admit this is a close one, since you can't really go wrong with either of these two cars, but our money would buy the Cadillac.
https://www.autotrader.com/car-reviews/2016-bmw-5-series-vs-2016-cadillac-cts-which-is-better-247726
The ATS-V is a more linear machine. It has more power, at 464 hp and 445 pound-feet of torque, but it delivers it in a saner, more accessible way. The M3 has a tendency to kick out its ass end even when you didn’t ask it to, which might seem insouciant but can be plain scary. The ATS has to be coaxed into any type of slide. The ride is better, less punishing, and the magnetic shocks are a wonder found on a number of GM products. They allow the car to ride comfortably over big bumps even at speed. By contrast, the M3 is so stiff it seems brittle.
https://www.theverge.com/2016/8/9/12408762/cadillac-ats-cts-ct6-versus-bmw