I would suggest that if you want to know whether or not they are from the same batch that you ask the seller. That is what the trade me question and answer section is for. In my opinion, from what I saw on Monday, they are not but then again I did not ask. They looked very nice and still relatively young.
From my understanding they are not that easy to breed. I also would imagine that the last thing a person would say on a public forum is that they have bred them. Once again, imo and ime, if you want to ask someone something like that the best way to do it is in private ie pm or email them. If they want you to know they will tell you.