This is not a technical review but more of a generalization.
JH13: PRO: Insane speed, detail retrieval and instrument separation. CON: While it has great lower bass extension, it is missing mid-bass so the presentation seems a bit "off". While no siblance, the detail is so intense it can get fatiguing for extended periods. Almost unatural.
JH16: PRO: Bassy HUGE holographic detailed presentation on every level. A real "WOW" experience. CON: It is such a big sound it may be fatiguiing at loud or extended listening periods.
W4: PRO: Detail retreival, natural sounding with a BIG soundstage. Very balanced and well represented on all frequencies. CON: could use a pinch more shimmer in treble.
All 3 are great IEM's. I saw an earlier post by someone that had these same IEM's, and was always stearing themselves back to the W4. Having owned all 3 myself I can understand this as well. It is just as "perfect" as the other two but is probably more well-rounded as something you would use day in and day out all the time. A true and pure audiophiles IEM where the other two try to beat their chests trying to do other more specific things. Straight up I would take W4 over JH13! W4 is that good. But being a bit of a bass head I would probably give a SLIGHT nod to JH16 over W4 but this just shows you how good W4 is at almost 1/3 the cost.