Can anyone tell me which airline's business class is better?

I will be redeeming a business class award ticket from TPE to SIN, and I can either take JAL and transfer in NRT, or take CX and transfer in HKG. I have never flown business on either of these airlines, are they comparable, or is one markedly better than the other?

If JAL is better, is it enough to justify the extra flight time that I will have to incur for the backtracking?