It depends on what you want most out of the recorder. The DR-07 is smaller and the DR-1 is more full featured. They both are nice recorders, and they both are small enough to stealth. If it were me (and I am a very happy Tascam owner), I'd download the manuals off the Tascam website, and see what all the real differences are, and I'd look at the features side by side. I'd look at the threads here for each recorder, and I'd look for how the backlighting works, is ther seamless files splits and look at my personal hot buttons until the one better suited to my tastes emerged.
If you leave it up to someone else, you will end up with their top choice. It may or may not ultimately be your top choice.