The BMW X1 is generally considered better than the Mini due to its larger size, more powerful engine options, and superior handling and comfort. The Mini, while offering a unique design and fun driving experience, is smaller, less powerful, and less comfortable for longer journeys.

The BMW X1 is a compact luxury SUV, offering ample space for passengers and cargo. It comes with a range of powerful engines, including turbocharged four-cylinder options, providing strong acceleration and smooth performance. The X1 also offers a higher level of comfort and refinement, with a quieter cabin and more advanced features. According to the 2021 U.S. News & World Report, the BMW X1 is ranked higher in the compact luxury SUV category than the Mini Cooper, with a score of 8.2 out of 10 compared to the Mini's 7.6.

On the other hand, the Mini Cooper is a subcompact hatchback known for its distinctive design and playful driving dynamics. While it offers a more engaging and sporty driving experience, it lacks the space and comfort of the X1. The Mini's engine options are less powerful, and the cabin is noisier and less refined. The Mini also has a smaller cargo capacity, which can be a drawback for families or those who need to transport larger items.

According to the 2021 Kelley Blue Book, the BMW X1 has a higher average fuel efficiency rating than the Mini Cooper, with an estimated 25 mpg city/33 mpg highway for the X1 xDrive28i, compared to the Mini Cooper's 28 mpg city/38 mpg highway for the Cooper S.

In summary, the BMW X1 is the better choice due to its larger size, more powerful engine options, superior handling and comfort, and higher fuel efficiency. While the Mini offers a unique and fun driving experience, it falls short in terms of practicality and overall performance.