Good luck! There are so many strains and so many crosses it's tough to keep track of them all.
Here is a link that will hopefully help you some.
http://www.discusnada.org/discus-classification/
What I do know is there are many variations of the PB strain. You have pandas, checkerboard, maze, pearl, rafflesia, red eagle, etc. Another problem is breeders will give their fish a different name due to one specific trait that they focus on that may vary it slightly.
It's safe to say that PBs don't have bars but not all barless fish are PB. General idea is non PB x PB will yield heavily peppered fry but I believe it's moreso a PB to a fish with bars. With that said they do successfully cross PBs with snakeskins which do have bars.
Over time breeders have minimized peppering but it's still a concern. My. PBs have very minimal peppering and I initially had them in a planted tank with black substrate.
I myself am a fan of the PB strains but many have something against them. I have a red check, a golden check and a rafflesia
Also a word of caution. Having only 2 2" can be problematic. It's best to have 5 or 6 and then hopefully you can pull a pair from the group once they mature.