Holy shit. It was easier to go around as yourself because people figured you out from about half a block away. The Japanese castle and St. Petersburg were such a headache.
In one part, 47 kills one of his clones, and changes outfits. I say change, but all he does is have a different tie, and you can walk away without suspicion. Put on full winter soldier garb in the same scenario and the game was having none of that.