Like everything else , people will prefer what they own so your not going to get much usefull info.
They both make great cues inside and out. I work with Nitti so of course I'm biased as well but I do currently own some of each. IMO , Capones are slightler more 'firm' whereas to me Nitti has slightly more 'feel'. Both can offer similar joints and materials whcih will fine tune the 'hit' to your liking so it really comes down to personal preference. Capones are little bigger name and might cost you more up front but get you more later. So , you might get more bang for your buck from Nitti up front.
No wrong answer either way IMO.
I don't work with either and I don't own either. But I've owned and played with cues from just about every recognizeable and/or big name out there. Szam, Searing, Hercek, Bender, Scruggs, Manzino, White, South West, Schick, Mottey, etc.
I've also played with a few cues from both Capone AND Nitti. And here's my take for what its worth:
Both cuemakers make great cues. Both make a solid product with good playability/feedback. If I were going to spend the money on either, I think based on some of the stuff I've seen coming out of his shop in the last year or so, I'd choose Nitti. Chris is doing some amazing work these days and while playability from either cuemaker is subjective, I'd rate the at the same level.
But Chris seems to have stepped up his design AND execution in the past few months, making some REALLY impressive looking cues.
JMO.