I got a lot of time in with the original Street Fighter 2 game, but it had a couple of shortcomings. Like if you had two people playing, they couldn’t pick the same character, and the four boss characters weren’t playable. But now? All that’s changed!
Really, other than those couple of changes and a few minor technical changes that only the hardcorest of players would care about, this game is otherwise identical to the old title, just refined a little. I guess the older one was successful enough that Capcom didn’t want to mess with the formula too much. But they’d end up tweaking it some more and releasing a few more versions over the years.