TAS is basically the fourth season of TOS done as a 1970s Saturday-morning cartoon. LD is a new type of show done with the adult-cartoon format in mind from the beginning. So, I'd have to give the edge to LD. TAS loses something from TOS whereas LD doesn't lose anything of itself. The one advantage of TAS has over LD, though, is I think TAS could run wild with its aliens sometimes. Something I don't think LD will either do or do as much of. The characters in LD have more personality to them. In TAS, the characters are watered down versions of who they were in TOS. And sometimes you can tell they were just reading the lines. The voice-acting in LD is a lot better.