About to order a backup camera for my 940BT.  I am planning to go with a name brand, I see that sellers have the last gen Pioneer ND-BC5 still available, also the ND-BC6.  Is there a difference that makes one better than the other?  Presumably the newer one is better but the specs seem identical and sometimes newer just means lower cost manufacturing process and not necessarily better.  Any feedback on this would be appreciated!