Review them all at your local library, and see which fits you best.
For your junior resident years, pick one of the big three - Sabiston, Greenfield, Shwartz. The content is *the same* in all, they're just edited and arranged differently. The one you choose is entirely up to your own preferences. Look at all three, pick the one you like.
Mastery of Surgery is best saved for your senior years in residency. It has less (or a more focused) background, and gives an emphasis on operative approach & technique. As a PGY4, this is currently my textbook of choice, along with Trauma and Maingot.
I found Cameron was a good way to transition between the junior and senior years. The chapters are short and to the point, and helps you focus on the clinically relevant material.
Hope this helps.