A lot have been said here, but a small comment from me ;
I have tested the same shaft with the same joint on different butt sections /cues
and for sure there is differences which is noticeable for the me as a player...
Many say - "it's the shaft" which makes the difference but my personal experience
is as mentioned earlier - that the whole cue makes a symphony of feelings
fed back through your hands.
I have a customer which owns a well known and highly respected US cue. He wanted
to change the SS collar around the joint screw and came to me. Since I own the
same brand I contacted the company directly to hear if this was something they
could do - so I did not create a "oddball" cue. The feedback was : "no I would
not do this conversion because it does not change the hit.....

"
A strange feedback I have to say - when you make cues.
Anyway - just my view on this...
K