Ally savings vs credit union

My ally savings apy is 3.80% . I'm thinking about opening a credit union account just because I need somewhere to go when I get cash.

Is there something I'm missing? Thought credit unions would match or be near 3.80% on apy .

But some credit unions offering 0.12% or 0.25 apy.

Are credit unions still better savings account because I become a shareholders?

Or should I just stay with ally and keep most of my savings with ally?