In the end it came down to the JH13 or JH16. What a hard decision!
I felt that the 16 had absolutely phenomenal detail on the bass. Never heard the like but the mids seemed recessed to me.
The 13's bass seemed a but woolly. Nothing special but the mids were much more forward.
Vocals sounded amazing on the 13's.
On the 16's heavy music such as ZZ Top. sounded fantastic.
Acoustic music such as Fiona Apple much less so. The bass sounded overdone to my ears.
In the end I went for the 13's as I felt that the "extra" bass of the 16's may well become annoying.
I'm still far from sure though!
All the units that I tried were universal demo models with Comply tips. So I hope that on my full customs the bass detail may improve.
In the end you pays your money and takes your choice.