Laravel check if results of GET query exists in another GETresults

I have 2 queries :

$branch_workstations = \Workstation::where('branchid', $user->branchid)
                                  ->select('workstationid')
                                  ->get();

$branch_updated = \WorkstationsUpdated::where('branchid', $user->branchid)
                                      ->select('workstation')
                                      ->get();

I want to know if values of branch updated exists in branch the result of the first query ($branch_workstations)

Any help ?

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