1968 valiant question?

the signets were more highly optioned. best clues are in the interior. the dash trim goes all the way across and will usually have a signet badge on the glove box. they also came with fancier upholstery. signets also had a chrome trim piece across the lower edge of the trunk lid and over the rockers.
100's are bare bones, 200's are a little nicer, signets are top of the line.