Database
[{"ID":"123456789","Items":[{"ItemDept":"softLines","ProductId":{"Name":"shirts","_id":"12345Shirts"},"Attributes":["blue","small","mens"],"Season":"Summer","Location":"online"},{"ItemDept":"softlines","ProductId":{"Name":"shirts","_id":"12345Shirts"},"Attributes":["blue","small","women"],"Season":"Summer","Location":"stores"}]}]
Query
db.collection.find({"$expr":{"$not":{"$setEquals":[{"$first":"$Items.Attributes"},{"$last":"$Items.Attributes"}]}}})