Last time i checked (and DOSBox hasn't made an official release since then) the vanilla DOSBox isn't able to run the game i made for an MS-DOS game jam a few years ago[0] because it doesn't implement RDTSC properly (that the game uses for timing). All currently developed DOSBox forks work properly.

Also the forks add some additional niceties, e.g. DOSBox Staging has some very nice CRT filters that basically make games look almost like the real thing (i have some actual CRTs to compare). DOSBox-X has a GUI to setup options while the emulator is running which is very convenient.

[0] https://bad-sector.itch.io/post-apocalyptic-petra