The New Railsounds Commander has intelligible crew talk like RS5. Not sure about the other sounds you mention.
None of the ERR boards are road or engine specific. I think pretty much all of the Lionel RS5 boards are road and engine number specific. That is not a plus unless you have that identical engine but no sounds. As for swapping chips, I have not tried that. If you have RS5 chips and RS4 boards you could try it.
Pete