I have heard the Hiawatha FP7s and they sound just like any other LokSound -- excellent. I don't know which exact speaker is in them, or baffle, but if they were mine, I wouldn't complain.
I assume these are coming with the latest/greatest sound files, which will be Full Throttle. If not, it is easy to update the sound project, using a LokProgrammer. Also, I don't know if the BEMF has been tuned or not.