Both have a fairly reasonable long chain PUFA ratio between 3:1 and 6:1 (6s:3s). Their short long PUFA ratio is much worse at about 20:1. Fish have a long chain PUFA ratio of about 1:20. Chris Kresser said to eat mostly ruminants and balance pork/chicken with fish. As long as your eating about 400g (1lb) of fish per week don't worry about the omega 6s from chicken and pork.
Of course this depends to some extent of how they're fed
The Paleo Premise: Nutrient Database