It's SUPER possible. But I guess one of them is going to be on the PZ (Joking).
I mean... both could get the benefit, Or only one of them could get prey benefits for shielding/loot or simply attack. It depends a lot on how the party is arranged. Remember that you could be a Druid Sioing and not doing the attack itself. SO, having the prey would only be a indirect thing for the party itself and not the Druid. Just have in mind that you could have a prey active and not doing the prey itself.
Thinking it through you could have a party of 2 in the following ways:
-Knight and Paladin (Both prey would be a somewhat kinda Understandable)
-Knight and Druid (Both with the same prey would be ironic as the Druid would only be Sioing)
-Knight and Sorcerer (The most understandable of the 2 Prey Slot)
-Paladin and Sorcerer (Weird but FEAsible)
-Paladin and Druid (The same with Knight and Druid)
You could do a party of a Sorcerer and Druid but...It's not that cammon.