Coin X is faster confirms....than coin Y
NO IT IS NOT.
Confirms are only a measure of security, a very fast times needs many more confirms that a slower coin to reach the same security. Because its easier to fork the block chain
If you watch a BTC transacion you will see a notification that something is coming alms straight away, but after that you wait for confirms.
If you don't believe me, look at the exchanges and see how faster coins often require more confirms, that because they are less secure.
This is true for all Satsohi code base coins out there!!! unless you do some sort of really spiffy latency alto stuff Like carmack did with quake.
as a forumla
security = time * speed of confirms * 1/speed of confirms = time * 1 = time.