Never tried the Fox 34’s but I have 160mm travel Yari RCs on my bike and they’re great. Although in context I’ve only tried 150mm travel RS revelations and 98 mazocchi Bomber z1’s.
Would think the Yaris are a bit heavier and a bit stiffer in terms of tracking as they have a very deep crown and 35mm stanchions.
They have motion control damping which is the only thing that makes them different from Rockshox Lyrics which have a charger damper.
Adjustments you’d have are air pressure, one general compression damping dial on the top of the fork leg and rebound damping adjuster on the bottom of the fork leg.
You can also adjust how progressive the air spring is with tokens.
All I’ve done is pump them up to the pressure advised then made a few subtle tweaks to that pressure and played with the rebound damping . Run the compression damping wide open.