Personally, I prefer the Schuler joint. I think Ray did all the right things years ago, and only in recent years have cuemakers (as a whole) understood the importance of the fit.
The Lambros joint systems I put right up there with the Schuler joint as well. And a good argument can be made of Mike's joint being superior.
As the newer cues (last 10 years or so) with big pin flat-face have addressed the fit, they are all so much better than 20 years ago (as a whole industry). But, I think they all still fall short of the Schuler and Lambros designs.
That's not to say I don't love the big pin flat-face, because that's what I normally get on cues that aren't named Schuler or Lambros.
Freddie <~~~ in my own wrong opinion