Thanks for the hint. You are right: Both queries are identical after parsing.
>>> -Ursprüngliche Nachricht-
>>> Von: Upayavira [mailto:u...@odoko.co.uk]
>>> Gesendet: Mittwoch, 28. November 2012 12:04
>>> An: solr-user@lucene.apache.org
>>&
Use debugQuery=true to see the format of the parsed query.
Solr will parse the query that you provide into Lucene Query objects,
which are then used to execute the query. The parsed query info provided
by debugQuery=true is basically these Query objects converted back into
a string representation,