pics 1 and 4 appear to be 2 different machines. one with genny.. one with alt. small difference on air hose.. and on air cleaner retainer band color.
2 and 5 have different rear lamps.
my guess is at least 2 different 601's
pics 1 and 2 have a more defined / newer rear tire tread.
pic 5 has worn tire tread in the rear..