I own all three. They’re certainly different from each other, but I'm not sure it's worth owning all three (unless perhaps you plan to use them on three different IEMs and leave the cables permanently attached). For a three-cable set it might make more sense to go with a cable that's more radically different, like the Orphy or OTL.
The Yatono and Shirogane are clearly siblings, when you listen to them. Different flavors of a similar sound signature. Yatono has more forward mids, more warmth in mids, more sub-bass. Shirogane has slightly better soundstage and separation, and certainly better ergonomics, as the cable is more flexible. The treble is better on the Shirogane, somehow a touch more relaxed but with more air/extension (even though that sounds contradictory). I prefer the Shirogane overall, but I could see someone preferring the Yatono's mids for vocal-centric music.
FTS is probably the warmest of the three in the bass and mids. It's got a touch more of an "analog" feel in the bass/mids vs. the Brise cables. I think the treble is comparable to the Yatono(?), but it's been a while since I directly compared them.