Stir, strain, coupe.
The drink taste like a Rob Roy (whisky+ vermouth).
I've tried many times to replace vermouth in different cocktails.
Apple juice, then sloe gin.
Sloe gin when mixed with an amaro or a fruity liqueur tends to mimic what a sweet vermouth tastes like.
Almost, this is the case with Plymouth sloe gin.
Vermouth is wood, fruity notes, wine notes, slight bitterness.
The sloe brings the astringency from the wine and wood.