Interesting that they are both part #22040HNN. However looking at the picture and description of each set indicates they are different.
Craftsman Set
Hobby File (Half Round & Flat Sides, Rasp & File Sections), No Handle
8" Round Mill *******, Handled
8" Half Round *******, Handled
8" Mill *******, Handled
7" Slim Taper, Handled
Nicholson Set
10" Half Round ******* Cut, Ergonomic Handle
10" Mill ******* Cut, Ergonomic Handle
8" Mill ******* Cut, Ergonomic Handle
8" Flat ******* Cut, Ergonomic Handle
6" Slim Taper File, Ergonomic Handle