I'm trying to learn 'ever fallen in love' by the Buzzcocks.

The main riff is C#m and B... If I were to transpose down 4 semitones, put a capo on 4 and play Am and G, is it the same (or similar) sound?
If you played am and g w/a capo on 4, it would be those exact chords (c#m and b). If you wanted to transpose the song down 4 semi tones, you would play am and g w/no capo