Ive owned both (and done good mileage on them), and as an ownership experience (and investment) the 888 wins it every time. As for looks, yes the 916 is just so pretty, but the 888 is every bit as gorg..but just in a different way - if that makes sense..
916 - Elegant, sexy, feminine
888 - In yer face, butch, classic
You'll also get more attention on a nice T8 as theres not many about !!
Cheers
Nat