The Magellan's loudspeaker is located at the bottom of the cradle and fires downward. Meanwhile, the TomTom's rear-firing speaker is located at the back, where the EasyPort mount connects. The TomTom seemed louder during our testing, but your results may vary depending on your vehicle's acoustics and placement.
Both cradles feature volume controls on the left edge. The TomTom has a rocker switch, whereas the Magellan's volume is a recessed dial located further up. Look closely and you'll see the Magellan's pinhole microphone.
The Magellan's more standard suction cup mount has only two points of articulation at the ball joint, where the arm meets the body, and a pivot just beyond that. The TomTom's EasyPort mount has a ball joint, a pivot, and slides on rails up and down the base.
Here we see the TomTom's EasyPort going from a low position to a high one. It's a small difference, but it adds a lot of flexibility for windshield or dashboard mounting without taking up a lot of space.
So, which cradle is best for you? GPS accuracy and speakerphone performance is about the same, so you can't go wrong with either. It really comes down to a question of form factor.
Anyone who wants to leave the cradle with the car, and use it with multiple iPhones and iPods with different cases, will appreciate the flexibility of the Magellan's mount. However, people who want to carry a slim cradle with them from vehicle to vehicle will like the svelte TomTom.