The matching score is probably the same, or very close in both ways, but this fact does not necessarily help in a three-way scenario: A <-> B: 80% A <-

The matching score is probably the same, or very close in both ways, but this fact does not necessarily help in a three-way scenario: A <-> B: 80% A <-> C: 90% B <-> C: 70% When you search for A the best match will be C, but if you start with B it will be A. If one of the accounts has a smaller sample set as in GP's case, the gap could be quite big.