i have a friend who uses the translucent one and she loves it (although she did tell me that one day she put too much on and it made her look kinda ghostly).
as i have learned with my MAC mineralize skinfinish, even if it's supposed to be just a hint of color, it can make a different to the skin color. so, if the Caramel would be any lighter than your skin color, really think if that's what you'll need in the end and if that's what you want to use for touch-ups.
i'd say go for the translucent.
or what you could do is apply some of your foundation to your hand and try them both out and see what it does for you (or your face... that would probably make the most sense... lol).