Two carrier boards for the Jetson Nano and Jetson NX/TX2 NX have been released by Seeedstudio with the same form factor as carriers used in NVIDIA development kits

 The NVIDIA Jetson Nano and Jetson Xavier NX developer kits' carrier boards have a similar size factor to Seeed Studio's reComputer J101 & J202, however, they have a somewhat different feature set. 

While the reComputer J201 board replaces the micro USB device port with a USB Type-C port, adds a CAN Bus interface, and switches to 12V power input instead of 19V, the reComputer J101 board features different USB Type-A/Type-C ports, a microSD card, draws power from a USB Type-C port, and retains the DisplayPort connector.

Features:

• Perfectly suited: Design for Jetson Nano Module (260-pin SODIMM).
• Dev Kit carrier board alternative: 1:1 matches the size and nearly the same functional design as the carrier board of Nvidia’s official Nano Developer kit. 
• Expandable storage: SD card slot for storage expansion of Nano module (16GB eMMC).
• Rich peripherals: Higher performance stability consists of USB 3.0, USB 2.0 ports, M.2 key E for WIFI, RTC, Raspberry Pi GPIO 40-pin, and so on.
• Super cost-effective: Suitable for the good start and quick evaluation of AI applications.
• Comprehensive certificates: FCC, CE, RoHS, KC.

 The official Jetson board does arrive with a non-production SoM with a built-in MicroSD card slot, despite the fact that it should also support production SoM with eMMC storage.

Since the carrier boards are so similar, it would be difficult to justify purchasing the reComputer J101/J201 boards unless you were maybe in need of specific functionality like CAN Bus or you somehow preferred other power alternatives. 

The reComputer J101 is available from Seeed Studio for $69, while the reComputer J201 carrier board costs $131 or $139 when purchased with a 12V power adapter.