Github Actions - Same workflow name, different branches. Which takes priority?

If I have a workflow in two branches "dev" and "main" with the same name and content, which one takes precedence? Or will both workflows run? What happens if the content of the two workflows is different, but the workflow name is the same?

Assume I have this workflow below on the main branch, but I have a slightly different version on a "dev" branch with the same file name and trigger (both on push branches dev). Would both execute on a push to "dev"?

name: .NET Core CI

on:   
  push:
    branches:
      - dev

env:
  AZURE_WEBAPP_NAME: ghactiontest    # set this to your application's name
  AZURE_WEBAPP_PACKAGE_PATH: '.'      # set this to the path to your web app project, defaults to the repository root
  DOTNET_VERSION: '6.0'           # set this to the dot net version to use

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      # Checkout the repo
      - uses: actions/checkout@main
      
      # Setup .NET Core SDK
      - name: Setup .NET Core
        uses: actions/setup-dotnet@v1
        with:
          dotnet-version: ${{ env.DOTNET_VERSION }} 
      
      # Run dotnet build and publish
      - name: dotnet build and publish
        run: |
          dotnet restore
          dotnet build --configuration Release
          dotnet publish -c Release -o '${{ env.AZURE_WEBAPP_PACKAGE_PATH }}/myapp' 
          
      # Deploy to Azure Web apps
      - name: 'Run Azure webapp deploy action using publish profile credentials'
        uses: azure/webapps-deploy@v2
        with: 
          app-name: ${{ env.AZURE_WEBAPP_NAME }} # Replace with your app name
          publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE  }} # Define secret variable in repository settings as per action documentation
          package: '${{ env.AZURE_WEBAPP_PACKAGE_PATH }}/myapp'

I tested this with a simple hello world workflow on the "main" and "dev" branches. If there is an "on push" trigger for a given branch, the workflow must exist on that branch. A workflow on "main" with a trigger for both "main" and "dev" will only execute on a push to "main" if there's no corresponding workflow on "dev".

name: .NET Core CI Cert

on:   
  push:
    branches:
      - cert
      - main
jobs:
  my-job:
    runs-on: ubuntu-latest
    steps:
      - name: my-step
        run: echo "Hello World Cert Branch!"