Ah, it looks like they are the same.
Such as it is as you say, Linux cannot play every game, but that is not a fault of Linux - it is only a restriction because the games that play only on Windows were crafted only for Windows and are/were not portable in their design and coding.
If you search this forum for threads with the keyword game, then you will find links to games that can be played on Linux - well over 300 last I recall.
Here's a link to the thread:
Linux Gamers' Game List: 371 total. (Now: 378)
-- Tom