So i have:
Carbon:
Cuetec Cynergy (when they first came out)
Tiger Fortis Pro
Bull Carbon
Keilwood:
Prather (one of Jeff's personal shooting shafts bought at SBE one year, when Keilwood first came out)
Bob Danielson SS360/2
Richard Hsu Hsunami 2.0
Are they different, yes... but not as much as you might think
Do i play with any of them on a given day, yes...
Frankly, maybe it is just me (i tend to like medium hard tips or at least firmer ones) but dialing in the tip, for the butt it is used on makes more of a difference than anything else.
BTW - the list regular maple shafts (1 Ash shaft and some low deflection maple ones, including ferruless ) i have is long and the other day, i pulled out the original DPK shaft with an Iv**y ferrule and a shaft Bender made for the DPK (short ferruled) and other than needing to stay a little closer to the center of the cueball... wasn't a big adjustment.
If i had to buy one shaft tomorrow, i'd probably buy a carbon... but only because of the cleaning of it, and potential longevity... and i say potential, because truly... we don't know how they will hold up 30 years from now. We do have a track record with Maple/Ash (except for as we clean them, over time the taper / size will change).
Which is better/more comfortable for you? Find some friends and try some... some you may hate, sound, pivot point, weight/balance on your cue??
of my 3 carbons (which playing often in bars get the most workout), Bull gets the most action (now has a lightly pressed triangle on it - the original kanji and i did not get along) as it goes on the DPK butt, Tiger Fortis Pro is very much a favorite, with a shot in tiger onyx tip (couldn't make anything when i first got it and the tip was softer) i can do things with that (power draw) that i cannot do with any other shaft i own. The cuetec, well it does get some play as a practice cue on my table, but for me... it is the 3rd of the 3 carbons i own.
YMMV - sorry for the long post