No one decidedly correct preference, just a preference based on who is playing.
Thanks for the links and the information. As for which is "better"? I don't know. But I do know I love the look of a Stainless joint, maybe because that's what I grew up with back in the day.
Good luck with your choice. I deliberately left my response open because of my condition: you can't really compare different joint types unless they're all on the same cue. Even then, if the test were truly blind you might get surprised. The mind works wonders, making you feel comfortable with one thing because you happen to like the aesthetics. In a true blind test, I might end up wanting a flat-faced SS joint. My preference for Ivory may simply be that I love the way that particular cue feels and that may be colored by the fact I already know which cue I'm playing with.
Like anything else, at the end of the day, it's what makes you happy that determines what is best for you. It's not the greatest answer, but it is the truth, or we'd all be playing with the same cue and arguing over which aiming system was the best instead of which joint is the best.