Look if you want one singlular reason why i believe ness is better, is because ness has a legitimate counterpick in Brinstar, that tips many match-ups in his favour. And if that is banned, he can take you to other stages that can be just as good in Delfino or Japes. Lucas doesn't have stages that affect him as much as the ones ness uses.
Ripple you lost all credibility to me when you said you never see Ness' never use Uairs. Uair is one of ness' best killers, killing most characters around 120%. Also when you said ness has no mix-ups, he can do more than short-hop Fair. He can do any combination of sour bairs, fairs, nairs, or a dair, in conjunction with three movment options in a short hop, a full hop, or a DJ rising aerial. Or if you think you'll be smart and shield, he can use the BEST dash grab in the game, to either throw you offstage with fthrow, in the air to attempt to juggle you with uthrow, or outright kill you with bthrow.
Chuee, you are so ridiculous you know, any response you have made is, "lol that is so wrong your stupid" you never actually disprove anything, you just shrug people off as saying they dont know what they are talking about, and that your knowledge is superior to everyone elses. And any time you actually tried a rebutle, it was nothing but theorycraft.
Lucas isn't bad IMO, the only reason this is so overblown is because Ness is in mid tier, and lucas is in low tier. IMO either both have to be low tier, or both have to mid tier, as they are not that different to the point that a tier seperates them.