You’re right, not the same but I still love credit unions! Multiple times now they’ve given me an interest rate on auto loans that no one else could beat. Plus most recent one I got a discount because the car was electric.
I think a credit union would be considered a “consumer cooperative” because the members are people who use the service/good, while Mondragon is a worker cooperative - the members are the people doing the work, and selling goods/services to others. (There are also residential coops for housing and multi-stakeholder coops)