Dwarves might get a HD bump, which is how they explained the d12 hit points for the fighter, instead of d10. But the dwarf cleric of Moradin has HD d8, so there is no consistency there.
The fighter has a mysterious +2 damage, aside from weapon focus. Maybe he gets +Con to damage. Maybe that's an unattributed slayer theme feature. Maybe it's a dwarf thing, and was missed for the cleric of Moradin. Who knows...
I don't think dwarves get +1 AC, unless they missed it for the fighter, which is possible. The fighter is wearing chain, and is sitting at AC 15, which is the listed amount. The cleric of Moradin has the +1 AC, which might again be an unattributed feature of the Guardian theme.
The elf wizard's +1 to hit might be coming from the magic user theme, and not from elf.
The halfing rogue's damage dice bump may be coming from the lurker theme. Or they could both be halfling features. Or one could be a halfling feature, one could be a rogue feature or lurker feature in any combination.
It's difficult to reverse engineer at this point because the character sheets have mistakes, and we simply don't have sufficient data. We probably have the most data about the dwarf and the cleric, since we have two of each to look at. And even finding consistencies there, seems to be challenging. Too many variables, not enough equations.