A difference in the Glen Breton single malt is a slightly distinct apple taste. The story they told us is that the stream from which the water used is taken goes up into the hills where there are numerous apple trees, planted back when the area was settled. These no longer harvested apples fall into the stream and as they deteriorate give it that apple flavor.
Like ——exactly, vis a vis: single malt vs blended scotch.
A gourmet would (if they liked it) seek out & pay more for that slight difference. A Cutty Sark / Jim Beam drinker would either not care, not like, or just prefer to pay less for their buzz.