Dealers in general tend to be more pricey in both labor and parts.
I use dealer mostly when car is new and if they satisfy me I stick with them. Recently though my dealer service managers changed and now recommend unneeded by maintenance. Fortunately a really experienced in my car make indy shop opened who I really like.
One advantage of dealer though is the occasional unpublished warranty. For example my wife’s 96 Honda Civic at 140k was stalling after driving high speeds and Check Engine light was on. We did not have a good shop so tried the local Honda dealer. Got a call of good news and it was going cost $1500 for new cat converter and two oxygen sensors! But they said Honda had an extended warranty and it was all covered and cost us $100 for an exhaust component that was rusty and not covered. I think an indy shop would have cost $750-$1000+ in this case.