Veslink Distances does not always have the same routing preferences set as does the Veson IMOS Platform Estimator.
When the Veson IMOS Platform Estimator sends the route it wants to draw to Veslink distances, it does not send the detailed route it calculated, but rather a sequence of ports and passing points. The detailed route is then recalculated by Veslink Distances, but it is not guaranteed to adhere to the same preferences.
In short, the comparison between the two systems is not like to likes. The Veson IMOS Platform takes into account the client's settings, while Veslink uses a more general set of inputs as it knows nothing about the client’s setting in the Veson IMOS Platform.