the description of the algorithm in the plugin help is:
Iso-Area as Pointcloud (from Layer)
General:
This algorithm implements iso-pointcloud analysis to return all network nodes reachable within a maximum cost level as pointcloud on a given network dataset for a layer of points....
This algorithm extends the capabilities of his little brother above as it queries the networks vertices inside a user-defined cost-range starting from multiple points provided in a point vector layer.....
The former is wrong because the algorithm calculates costs at all vertices and not only at nodes.
the description of the algorithm in the plugin help is:
Iso-Area as Pointcloud (from Layer) General: This algorithm implements iso-pointcloud analysis to return all network nodes reachable within a maximum cost level as pointcloud on a given network dataset for a layer of points....
the description of the algorithm on the web page: https://root676.github.io/IsoAreaAlgs.html is the following:
This algorithm extends the capabilities of his little brother above as it queries the networks vertices inside a user-defined cost-range starting from multiple points provided in a point vector layer.....
The former is wrong because the algorithm calculates costs at all vertices and not only at nodes.