problem is: you give 2 choices: OB cues (and shafts) are low deflection designed shafts/cues.
carolina cues are custom cues with a full hard maple shaft (no laminate)
both will feel entirely different, play different, sound different.
so, my best advice is, try them out (if you have this oppurtunity)
I play atm with a carolina and i really like it. i never jumped on LD cues since most felt to whippy for me, but i also have to say i have never tried an OB cue or shaft. Your best option is clearly to try out as MANY cues as possible. dont limit yourself to only 2 options.
when you hit the CB with a cue and you feel "IT" (lets say the "love"
) you will know it :thumbup:
good luck with your research