Quincy's been bottled, and after just over a week, is startin to show carbonation.
While there's lots to be said against this beer (awful pectin haze being just one), it really was a lesson to me about how Belle Saison pairs well with fruit. Although the Brett may have helped, it seems all those flavours I dislike about BS blend nicely with the (quite overstated but hey, why use quince if you want subtlety?) quince flavours.
Going by what little experience I now have with wyeast 3711, I'd say I made a lucky potshot with this beer: the "true" saison character of 3711 would have become lost in the quince here. Likewise, that Citra siason I brewed with 3711 would never have worked with BS, because the latter would have completely outshone the more delicate citrus notes.
So, generalising callously: Belle Saison for (not so subtle) fruit saisons (quince, stone fruit, pineapple, mango, ...) and 3711 for "cleaner" saisons.