The 2023 Cadillac XT6 is larger than the Cadillac XT5. The XT6 has an overall length of 198.5 inches and offers up to 78.7 cubic feet of cargo volume. Meanwhile, the XT5 has an overall length of 189.6 inches and offers up to 63.3 cubic feet of cargo volume. The 2023 Cadillac XT6 also has three rows of seating compared to two in the XT5.