John

Sure you could change to piano on any of them and often it will work, The reason that some don't sound right is if you have a horn section, guitar or some other instrument that is using a typical emulation that those instruments do it won't sound right on piano. Say you've got a guitar that bends a note or a horn section that does a fall, this is not characteristic of piano and will not sound right. So, if you don't like it, record a part that you would like the piano to do.

I would really think this would be so on all brands.