Very good, but lacking the ability to compare values from custom fields

Very good, but lack the ability to compare values of custom fields, sometimes it is not always the title that we do not want to be the same, when we have many posts, sometimes the titles are the same, but the content and images are different, and not is duplicity of content, and sometimes we want to avoid that there are posts with other data equal, like the values of a particular custom field, eg: mypostID: 15798654 delete all duplicate posts with value based on mypostID values (only one example is clear ) there is no plugin that avoids duplicate custom fields. put a text field to be filled with the name of the custom field that we want to avoid duplicity. I will be happy to upgrade to 5 stars so the extender plugin plus those features that no other offers.