From the email exchange I had with Raze a while ago all are standard game keys, so no difference in content (?).
Difference from the CE and the digital CE is that content is digital, like the books are digital form, not the printed ones.
Quoting ( and I hope not breaking any rule )
" (...) the physical Collector's Edition from the D:OS 2 site is just physical, and contains a Steam key for the standard version of the game, not the digital CE (...)"
Hope it eases your concerns as it did mine. It became clear the game is the same for all, no "extra loot" or "special crates" or "premium cache" as we see flooding the market :)
