Which is more important for reducing s-risks, researching on AI sentience or animal welfare?

Not every people in Effective Altruism put wildlife welfare in the top cause area. Instead, a lot of people concerns on AI safety more.I think people here maybe have arguments upon this. If we don't consider human extinction risks(x-risks), only discussing suffering risk. Can we assert Animal welfare or AI sentience, which is more worthy to be researched?(Despite those two, there may be other parts I didn't mention) It'll affect people's career decisions. I think there are a lot of uncertainty and aspects to think about this. Please share your ideas or some articles related!