re: Splined Dovetail or Inlaid Dovetail

My first  vote would be for the spline inlay, reason being it would be an sneaky way to  effective to extend the length of a piece of timber if you "goofed" up and really needed to use it.
The attractiveness of the inlay is vote two as its much the same as a woman, it  doesnt really serve any purpose but generates a lot of work but definitely looks good. ...snicker snort!