Cypress: How to compare textvalues/ textelements with .each()

I try to read out a table and compare all textvalues. If there are two times the same value, the test should fail. I try this by using a counter. If counter == 2 then fail. But I cant enter the if-statement, cause cypress cant compare the textvalue..

let duplicateCounter = 0

cy.get('[data-cy="projectList"]')
   .find('[data-cy="project.name"]')  // I'm using my own marker for my table
   .each((MyElement, MyIndex, MyContentOfArray) => {
   cy.wrap(MyElement.text())
   .then( (tmp) => { 
       cy.log('tmp = ' + tmp)
       if(tmp == "001_AA_Testproject") // it never enters the if-Block, cause textcomparing isnt working
       {
           cy.log('============================================ if Block ' )
           duplicateCounter += 1
       }
   cy.log('duplicateCounter = ' + duplicateCounter)
})

cy.get(duplicateCounter ).should('eq',1) 

How can I use if-Statements in .each()-loops?