Nio is Tesla's biggest competitor in the Chinese electric-vehicle market - here's how its ES8 SUV compares with Tesla's Model X

The Model X can accelerate from 0-60 mph in a minimum of 2.8 seconds, while the ES8 can do the same in around 4.4 seconds.

Both the Model X and ES8 can seat up to seven people. The Model X also has five and six-seat configurations, while the ES8 has a six-seat configuration.

The ES8 has a drag coefficient of 0.29, while the Model X has a drag coefficient of 0.25. A lower drag coefficient indicates that a car is more aerodynamic.

The Model X starts between $89,500 and $104,000 before incentives, while the ES8 starts between around $67,000 and $68,000 before incentives.

The ES8 is available only in China, while the Model X is available in the US, Europe, Canada, and the Asia-Pacific region.

Tesla owners can purchase Autopilot, a driver-assistance system that can handle acceleration, braking, and steering under some circumstances with driver supervision.

Nio has a driver-assistance system called Nio Pilot that will have similar capabilities the company plans to introduce this year through wireless updates.

Tesla has around 1,440 Supercharger stations designed specifically for Tesla vehicles. Nio provides owners with mobile charging and battery-swapping services.

Drivers and passengers control most features in the Model X through a 17-inch touchscreen. Tesla also sends wireless updates to its vehicles that include new features and performance upgrades.

The ES8 has a 10.4-inch touchscreen, heads-up display, and voice-activated system called Nomi that can control settings like music and navigation.