"I thought the guitar sounded better with the original tusq saddle and I put it back in. However, on some guitars I have preferred the bone saddle,"
I did the same with my 414ce - went to bone then, after a week, put the original Tusq back in. As noted, it's a cheap experiment, especially if you make the saddle yourself - bone is cheap from any of the various guitar suppliers. I make a lot of bone saddles for guitars I own/have owned, whether steel or nylon-stringed because I always change the action height from oem. But sometimes a bone saddle is NOT an improvement over tusq/whatever, despite what guitar makers claim/charge for the "upgrade."
"upgrade" is a currently fashionable word for something that, IMO, is just a change, not necessarily better. Everybody calls anything they do to a product an "upgrade." Sometimes it's the oppositeā¦like a bone saddle on my 414!