JL F is not full service F on HNDSFO there's not a full meal service as there is on other JL F flights. There's a big thread about it on the JL page (I would link if I wasn't in my phone) that you should read for experiences. For that reason alone I would say to go with CX.
The seats on both are quite nice (though JL center seats are better for talking) but the pajamas on CX are better. I've flown both this year and I rank JL slightly higher with the exception of the flight in question (though I did SFOHND in J and it was fine but my primary goal was sleeping, not maximizing the experience).
If it was an NRTUSA flight on JL that would be a different story but for HNDSFO it's not worth the extra stop and time.