that is a hard call. In some ways, neither are worth it. In others, both are worthy. The JH13Pro is a more neutral earphone, but both are hard to drive. To the get JH13Pro's 'real' frequency response, you will need an amp which can push them properly: ALO Rx, Shadow, ostensibly the Pico as I have not tried it.
If not, you will lose bass response and lose channel separation, two things which the JH13Pro can do very well. There are other problems: distortion. The 1601 series isn't as hard to 'drive' in that sense, but it favours a bassy amp. The Voyager and 1601 is a more hifi listen than the JH13Pro - not studio or professional like, but the most pleasing earphone for certain tastes.
My tastes prefers the 1601 for: incredible (eerie) listening and better layering. Keep in mind, that is with the Voyager or a good home amp.
The JH13Pro is hands-down more practical - there is no point of comparison between the two. But, when push comes to shove, I prefer the SS and Voyager to the JH13Pro. I want to go hear the SB version too to see if it and the Voyager have synergy, though James hinted that they do. If so, I reckon that combo will really be for some, a bargain.
Again, the JH13Pro is ever so much more practical: it can be used in doors or outdoors. but, I like using the 1601 as a home headphone - it does what I want. If you want portable, I cannot really suggest the 1601 unless it means just taking it to office and home. It sounds like a headphone and works like a headphone: music comes in and goes out and it needs a beefy sounding amp to sound best.