Right now I have a 2tb SSD inside my old LCD deck that I would like to put inside my LE Deck, but I’m curious if I’ll need to find the steamOS 3.5.5 image and do that whole process again. I was also planning on giving the LCD one to my brother once I’m done, would the 1tb SSD that’s inside the OLED deck need to be reformated as well?
Swap should work assuming you are running the latest version of the software on both.