Differences between TX Development Kit and SOM??

Hello, I am completely new to all of the NVIDIA stuff…Dumb question:
What is the difference between the TX Development Kit and the System-on-Module?
For example, how do they work differently on a robo race-car?

The development board is a board hosting the SOM. It provides connectors and adapters/controlers for power, USB, Ethernet, Wifi, SATA, HDMI and more. Also hosts a bayer sensor camera.
The SOM itself mainly has the CPUs, GPU and memories, but no other interface than pins to be plugged into a host board.

There are several manufacturers of different carrier boards of different sizes and with different connectors/features…the module can plug in to any of them. The dev board (one of several possible carrier boards) could be used in an end product; it is basically the size of a mini-ITX motherboard with a similar set of connectors on the back which a regular motherboard might use, and one PCIe x4 slot…it’s a good representation of much of the I/O the module is capable of once you look at all of the headers and other connectors.

One thing to note is that if certain guidelines are followed, then both a TX1 and TX2 can use the same carrier boards. If the carrier board works on a TX2, then it is very likely it works as a carrier for a TX1. The reverse is sort of true, but some features using some of the module pins of a TX2 were not implemented on a TX1…putting a TX1 on a TX2 carrier shouldn’t imply that it adds features the TX1 didn’t implement…and if a TX2 is used on a TX1 board, it is possible those newer features of the TX2 which weren’t present when the first TX1 was produced will not be wired and thus won’t be accessible.