When comparing today's leading luxury sedans, the 2026 Cadillac CT4 and 2026 BMW 3 Series are two models you’ll see everywhere. Whether you prioritize interior luxury, performance, or the top tier of design, style, and technology, both the 2026 Cadillac CT4 and 2026 BMW 3 Series aim to please. This compact luxury sedan comparison shows Roseville drivers how these premium models differ in performance, interior comfort, technology, safety features, and overall value. Keep reading to learn how the 2026 Cadillac CT4 and 2026 BMW 3 Series compare.