Comment by AshamedCaptain

The differences between the different "hardware of the time" are larger than between any of the emulators you mention. This is not consoles where the hardware is exactly the same over and over. PC hardware is mostly poor clones of poor clones of the original under-specified hardware and even software emulators of such clones whose only thought of compatibility amongst each other is "does Windows boot already?" (and most specially in the 98 era) . Go and ask Linux...

In fact, (having worked for quite a while in supporting decades old enterprise software) my experience with most PC virtualizers and emulators is that they're ridiculously accepting of errors that will most definitely trigger random behavior in (at least some) real hardware.