I want to add something more. Most of the questions give few clues which can be useful in differentiating these two. In Wegener Granulomatosis patients having history of recurrent sinusitis while patients with goodpasture syn presents with hemoptysis and nephritic syndrome.how to differentiate Wegener and Goodpasture?
In Goodpasture only involved organs are kidney and lung, but wegener is a multisystemic disease, furthermore we maybe see in question two antibodies:
antibasement membrane : goodpasture
c-anca : wgener granulomatosis