Need some clarification on the Gillette Cartridge systems. I currently use a Merkur Progress and a 73 Gillette Super-Speed and love them. However, when I travel I dont want to risk these guys to be lost or stolen when I travel. My question is about Gillette Cartridges. I would like to venture into either a Trac II or Atra Razor. I was wondering if these twin blades made by Gillette perform like a Mach 3 or Fusion with the tug and cut action which causes in-grown hairs and bumps. For that matter does the Sensor behave in the same way tug and cut? Any input would be greatly appreciated..Thanks