they're all very close when it comes to performace and use of resources. i don't know much about winzip tho
Okay, if they're all the same, which one has a nicer User Interface? The UI of WinRAR made me say, EYOOO!
imo winrar has the best ui, but it comes with a price. if u don't pay for the full version you'll have to close a little pop up everytime you use winrar
IMO winzip has a nice UI. 7Zip IMO is the most "powerful". I don't know why but I've always disliked WinRAR, I used to have trouble opening their rar containers.