You’re right, they are very similar! The main difference between the Mazda CX-5 and CX-9 is their size. The CX-5 is considered a compact SUV crossover while the CX-9 is a midsize SUV. Let’s take a look at what those entail.
The Mazda CX-5 seats up to five passengers, while the CX-9 can hold up to seven passengers between its three rows of seats. The CX-9 is also around 20 inches longer than the CX-5, and it also sports a more powerful engine. On the other hand, the CX-5 offers better fuel economy. Both SUVs are equipped with standard comfort and technology—though the CX-9 offers more luxury features as standard.