The two different dashes are not interchangeable without a serious facelift (ie - changing almost the entire dash). I agree with everyone else, the dash mounted cupholders are trash (the slide out one under the air vents and the ones that take up a full DIN below the AC). The slide out ones don't fit many glasses, and the pop-out ones aren't tall enough which means lots of spilled coffee on your radio, shifter, and yourself.
Get a $30 Ultimate Cupholder and call it day. They work a lot better than you would expect.
