Betweenness Centrality procedure returned different results for same data using different modes

[Joshua-Yu]

The results of the below 2 queries should be the same as the only difference is the type, i.e. heavy and cypher:

1. CALL algo.betweenness.stream(
   '城市',
   '铁路连接|公路连接',
   {direction:'both'}
   )
   YIELD nodeId, centrality
   RETURN algo.asNode(nodeId).name AS node, centrality
   ORDER BY centrality DESC

2. CALL algo.betweenness.stream(
   'MATCH (n:城市) RETURN id(n) AS id',
   'MATCH (n:城市) -[:铁路连接|公路连接]-> (n1) RETURN id(n) AS source, id(n1) AS target',
   {graph:'cypher',direction:'both'}
   )
   YIELD nodeId, centrality
   RETURN algo.asNode(nodeId).name AS node, centrality
   ORDER BY centrality DESC

Both have returned 151 records but with quite different ordering and scores.

What did I miss?