Then a wood to wood joint vs. a metal joint makes little difference as log as it is a spliced butt?
I've played many years with a wood to wood & then many years with a steel to steel & now a steel to mix of collar & wood. I would say that they all have a bit of a different feel, more solid, more feedback, etc. but I really did not find that much of, if any real difference in actual playability. They all play well. So, that would be a matter of personal preference & the only way to determine that is to play with all of the different combinations
As to the spliced butt, that is just my personal feeling & what I heard Mr. Meucci say when doing his shaft deflection testing. However, I think it showed a signifcant difference in the test, but he was not testing many different spiced shafts & i am fairly sure that they might be inconsistent even within makes & models.
So I would say that my opinion is far from being anything conclusive. But that being said if I had a choose I know how I would roll the dice.
Again, I hope this helps.
Regards,