QDataStream to QByteArray and ViceVersa

[alokraj001]

QByteArray data = QByteArray::fromHex("200000008305370FFFFFF630500008E");
 QDataStream dataStreamToReadFrom(&data, QIODevice::ReadOnly);
 QByteArray convertedData;
 dataStreamToReadFrom >> convertedData;
 
 QString Str = data.toHex();
 QString convertedStr = convertedData.toHex();

QByteArray data = QByteArray::fromHex("200000008305370FFFFFF630500008E");
 QDataStream dataStreamToReadFrom(&data, QIODevice::ReadOnly);
 QByteArray convertedData;
 dataStreamToReadFrom >> convertedData;
 
 QString Str = data.toHex();
 QString convertedStr = convertedData.toHex();

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Here Str and convertedStr are not same. Why?

I want to bothe QByteArray data and converted Data to be the same. How to achieve that.?