The Chevrolet Trax is essentially a less expensive and less upscale version of the Encore. The Buick has a nicer cabin and more standard features, but both SUVs have the same base engine and similar fuel economy. However, the Encore has an optional engine for more power. The Buick also delivers a smoother ride than its Chevy cousin. If you want a more luxurious SUV, go with the Encore. But for those on a tighter budget, the Trax is an OK choice.