Hey, NewRisingSun2, it seems that the codes B, A, A, A, Left, Right, Start (Zangief Ending), and B, A, A, A, Down, Down, Start (Zangief vs. Vega) work in practically all versions too. For this version "Street Fighter II - The World Warrior (Unl) [!]" (the oddball) if RAM address $6C6 = non-zero then invincibility mode is enabled.
Zangief ending code data string: 408080800201
Zangief vs Vega code data string: 408080800404
Invincibility code data string: 020240808002
Basically if the ROM has the data string "020240808002" then you can almost rest assured that it has the Invincibility code.
I did not see any other title screen button-press data strings of interest in most of the other versions of this game...