Gta san andreas compatibility question

Hi guys, I've grown sick of the bug riddled san andreas port on the X one, and I was thinking about buying the OG xbox disc, so I could play it in the X360. My only doubt is: is it the actual original game or it will download the "upgraded" version, similar to what happens if you use the OG xbox disc on the X one.

Thanks in advance!

Original Xbox games on the 360 run off disc, there isn't any download, it will be exactly the same game.