Exclude items of one list in another with different object data types, LINQ?

Question

I have two lists filled with their own data. lets say there are two models Human and AnotherHuman. Each model contains different fields, however th

Answer 1

var nonIdItems = anotherHumans
   .Where(ah => !ah.PersonalID.HasValue)
   .Join(humans, 
         ah => new{ah.LastName, 
           ah.FirstName, 
           ah.Birthday}, 
         h => new{h.LastName, 
           h.FirstName, 
           h.Birthday}, 
         (ah,h) => ah);
var idItems = anotherHumans
   .Where(ah => ah.PersonalID.HasValue)
   .Join(humans, 
         ah => ah.PersonalID
         h => h.PersonalID, 
         (ah,h) => ah);
var allAnotherHumansWithMatchingHumans = nonIdItems.Concat(idItems);
var allAnotherHumansWithoutMatchingHumans = 
      anotherHumans.Except(allAnotherHumansWithMatchingHumans);