Bluetooth mate vs. Bluetooth modem?

What is the difference between the bluetooth modem gold, and the bluetooth mate gold??? Which would you want if for example you wanted to control your arduino remotely with your android phone to do something?

Over 180 posts, and you don't know the first question that will be asked?

Where are the links?

Sorry, I just keep thinking you guys know everything, and that you'll know exactly what I'm talking about...

On the Bluetooth Mate Gold page:

Bluetooth Mate Gold

sku: WRL-09358

Description: The Bluetooth Mate Gold is very similar to our BlueSMiRF modem, but it is designed specifically to be used with our Arduino Pros and LilyPad Arduinos. These modems work as a serial (RX/TX) pipe, and are a great wireless replacement for serial cables. Any serial stream from 9600 to 115200bps can be passed seamlessly from your computer to your target. We've tested these units successfully over open air at 350ft (106m)!

The major difference appears to be the arrangement of the pins that need to be connected to the Arduino.