depends on your prioritys I guess, and potential resale value.
both have their virtues. With the Ti KK or HeiHei obviously being retro cool as well as supple and ability to sell on years later for same price.
if you fancy something new that will happily take all modern components (without looking a tiny bit out of place), then the carbon Kilauea is the way to go.
Personally, Id say you only live once. Buy them both!.
I'd be very keen to thrash a Kilauea though, I bet its lightning quick.
HeiHei is easier to look after though...and comfier for longer stints.
not making this much easier am I?