I never knew there were two version of the minute repeater movement. I have only seen the one shown on the bottom. The one on top looks to be much higher end with a free sprung balance, better bridge architecture, and finer beveling on the bridges.
How good would you say the polishing service from Cartier is? I want to get some of the deeper scratches out of my Tortue but I'm hesitant to send it in because I'm afraid they might over-polish to the point of losing the case shape.