What's the easiest way to migrate one Mac OS X volume to another

Solution 1:

Try Carbon Copy Cloner. It does a bit-by-bit copy, which should guarantee that it is an EXACT copy. I hope this helps.

Solution 2:

SuperDuper is the best way to clone drives in OS X. You can rename the destination drive in Finder.

Solution 3:

I prefer a cold clone if you can. Boot to the OS X install DVD, launch Disk Utility, click the old volume, then the Restore tab. Drag the old volume into the source field and the new volume into the destination field, then click Restore and Yes to erase destination volume. Double check yourself to make sure you don't get the source and destination swapped. :)

If a cold clone isn't an option, Carbon Copy CLoner is the next best thing.