Difference between nodetypes structure.

[hsp]

Hi;
I would to know what is the difference between the following implementation 
code:
"   Node fileNode = parentnode.addNode(file.getName(), "nt:file");
     Node resNode = fileNode.addNode("jcr:content", "nt:resource");
     resNode.setProperty("jcr:mimeType", mimeType);
     resNode.setProperty("jcr:encoding", "");
     resNode.setProperty("jcr:data", new FileInputStream(file));
...."
 and the another:

" Node fileNode = parentnode.addNode(file.getName(), "nt:file");
  fileNode.setProperty("jcr:mimeType", mimeType);
  fileNode.setProperty("jcr:encoding", "");
  fileNode.setProperty("jcr:data", new FileInputStream(file));
...."

What is the consequences, considerations. Is it wrong? Is the first 
implementation necessary? What is the best pratice for?

Thanks
Helio