Firstly, the BMW X3 generally offers more powerful engine options and a sportier driving experience than the Lexus NX. However, the NX has good fuel economy and a smooth ride quality. Also, both vehicles offer luxurious and high-quality interiors, but the BMW X3 generally has more space for passengers and cargo than the Lexus NX. In addition, both vehicles have strong reliability ratings, but Lexus has a reputation for exceptional long-term reliability. Lastly, the Lexus NX is generally priced lower than the BMW X3, but this can vary depending on the specific model and options selected. Ultimately, the choice between the Lexus NX and BMW X3 will depend on the customer's preferences and priorities.