query: SELECT DISTINCT 
  ?item ?itemLabel
  
  ?PCQualP669 #postal code as qualifier of P669
  ?PCQualP669_SpacesStripped 
  
  ?PCP281 # postal code as statement P281
  ?PCP281_SpacesStripped 
  
  ?PCsTheSame
  
  WHERE
    {
    ?item (p:P31/ps:P31) wd:Q28564,wd:Q11396180;wdt:P17 wd:Q55. 
      
    ?item p:P669 [pq:P281 ?PCQualP669]. #postal code as qualifier of P669 
    BIND(REPLACE(?PCQualP669," ","") as ?PCQualP669_SpacesStripped). #get rid op spaces 
    
    ?item (p:P281/ps:P281) ?PCP281. # postal code as statement P281
    BIND(REPLACE(?PCP281," ","") as ?PCP281_SpacesStripped).#} #get rid op spaces --> THIS DOES NOT WORK!!!, WHATS WRONG???
    
    BIND(IF(?PCQualP669_SpacesStripped = ?PCP281_SpacesStripped, "TRUE", "FALSE") as ?PCsTheSame).  
  
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }  
  }
  
  ORDER BY ASC(?PCsTheSame)