Trenz Electronic provides Module series with different assembly options (FPGA size, speed grade, temperature range, DDR size, QSPI size, eMMC size, less components, different stacking height...)
Identification can be done with the Article number and the corresponding Schematics in the download area of the modules. Module series name and PCB revision is directly printed on the module. Every module has also an unique serial (number on white sticker with QR code on the module), which can be used to identify the whole article number (and thus the assembly options).
Article number style has changed since 2019, so that you can identify main parts also with the article number encoding table:
Article Number Information