The game is also available on MS DOS, can we have the platform available?

I can certainly add it.

How is the game different than the SNES/Genesis version? Does it run at a different frame rate? Does it have levels that the other versions don't or vice versa? Etc.

I need to know if it's different enough to get its own category or if it can be grouped together with the others and just be another option of platform.

On the basic side, the game pretty much looks the same, but there are some differences.

The positioning of hazards is kinda different (or I am dumb, I don't know), you can have more than 4 hearts, the Junior Model is an Easy Mode (less hazards), instead of just the model minigames and there's an option of speed of the gameplay (Slow/Fast).

In terms of framerate, I don't know very much that kinda tecnicality

I did a run for fun some months ago

I'll look into this.

I'm not familiar with what DOS emulators are generally accepted for speedruns, so I'll have to do some research first.