I got my permananet residency processed in London before coming to stay here in 2007. My DNI was obtained in 2010 after much faffing about. The only differences I noted between my DNI and my Argentine wife's are that mine is only valid until 2025 and the booklet cover is deep maroon in colour compared to my wife's light blue. Nowhere on either the the booklet or laminated card does it say "extranjero". My number starts 94