Difference between QHttp::get and QHttp.request

[LMZ]

first:

QString Username("Test");
QString AuthValue("Test1");
QHttpRequestHeader Header;
Header.setRequest("GET", "/data/feed/api/user/" + Username + "?kind=album");
Header.setValue("Authorization", "GoogleLogin auth=" + AuthValue);
 
QBuffer AlbumsXml;
 
http->setHost("picasaweb.google.com");
httpGetAlbumsId = http->request( Header, "", &AlbumsXml);

QString Username("Test");
QString AuthValue("Test1");
QHttpRequestHeader Header;
Header.setRequest("GET", "/data/feed/api/user/" + Username + "?kind=album");
Header.setValue("Authorization", "GoogleLogin auth=" + AuthValue);

QBuffer AlbumsXml;

http->setHost("picasaweb.google.com");
httpGetAlbumsId = http->request( Header, "", &AlbumsXml);

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second:

http->setHost("picasaweb.google.com");
http->get("/data/feed/api/user/" + Username + "?kind=album", &AlbumsXml);

http->setHost("picasaweb.google.com");
http->get("/data/feed/api/user/" + Username + "?kind=album", &AlbumsXml);

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these two snippets have difference, i can't find what!
help me please.