Battleborn on PC cheaper than on consoles?

So I just checked the preorder prices for Battleborn on Amazon and a few other sites and the price for PC is much cheaper than console in every site. It’s always £44 for PS4 and Xbox but goes down to £28 for PC and I’m just wondering why theres a huge difference?

Also is the PC version on Steam?

The PC version requires Steam. Price differences…I dunno. Ask MS/Sony.