The lines are blurry, but taking that aside, there are more or less clear differentiating factors. Do a bit googling and listening and you will get this.
I personally was googling the difference between pluck and stab recently and have found good descriptions…
Pluck = usually a one or two two note sound, which has a sharp attack with a very short decay and or release. You hear plucks in Trance / EDM type songs. pluck to be a synthetic variation on a pizzicato type sound from one string instrument playing by itself. Suitable forinstance for arps and little melodies.
Stab = usually a three or four note chord, which sometimes will have longer attack and with a relatively longer decay and or release than a pluck. You hear Stabs in Downtempo / Hip Hop type songs. A stab as I think of it originally came from sampling an orchestra playing a chords. Not so suitable for arps and melodies, I think of it as more for dramatic emphasis.
They both have an immediate attack. A pluck then fairly quickly fades down to zero volume. A stab keeps its volume but then cuts off immediately; or, it could fade but it does so almost immediately, but in any case its sustain level is the same as its maximum level.
A stab for me is something unmelodic, rather like a percussive sound, which you use in your music as kind of a counterpart, or something which stands out, while a pluck is something melodic, like a sequence, or a pattern. A stab usually has a hard attack, and sounds harsh, or percussive too. A pluck i would usually characterize as softer.
stab = chord (3 or more notes), envelope is very short…short release short decay, used in progressive trance and house, usually filter envelope is short decay medium sustain and cutoff is medium to low…env amount is higher >50%
stab is usually triad or 6th, 7th chords…etc
usually saw waves detuned
pluck= single note (2 or less notes), envelope is short, short decay, but longer release here notably, add delays, big delays, good for arps and melodic lines, used in prog trance, prog house, bigroom
pluck is usually single note or 1st+3rd, 1st 5th, etc
usually higher freqs and triangle waves or squares, (not saws)