I've seen more joint breakage on welded frames than on lugged frames. Pure anecdote, of course, but my opinion is that welds are more likely to fail than lugs. I also believe, though, that most riders will never experience a broken frame regardless of joinery methods.
As to ride, I firmly believe there is no difference, assuming the same materials.
All told, I'm pretty sure that the only "advantage" of lugs is cosmetic. This matters to me, but is of course not anything worth arguing about.