So, after doing an analysis on Lucas and Ness I think I have a pretty good idea on who is who. It really just depends on who you need for what situation. For example, I hear Ness's Final Smash is a stage-wide attack that can't be control, whereas Lucas's is controllable but has a small range. If you're playing against an inexperienced friend or two it would be a good idea to play as Lucas, but if you're playing against an expert of 4+ players, you might want to consider Ness.