Guess I'm the first one to see this ... so welcome to the forum. You've come to the right place for information. A lot of the guys / ladies here have a lot of knowledge that they are happy to share. I think the first thing one of them will say is that serial numbers and photos would be a huge help in id'ing your guns and make it easier to find info on them.
At just a guess ... unless its a particular mod. 36 from a certain police agency .. or something else that sets it apart its not rare. You see more of the round butt because people prefer them for carrying.
Other than that it sounds like youv'e got a couple of nice guns that you should enjoy for a long time.