|Originally posted by bayourocket|
Do the extra patterns allow you to make other adjustments, or do they simply give you alternate ways to adjust the same settings to the same values?
The calibration discs do contain many more patterns that allow you to make other adjustments. However, one's ability to access those adjustments depends a lot on your specific TV. It can also depend on whether or not you are willing or able to go into the service menu, something that is generally not recommended unless you have a very clear idea of what you're doing.
In addition to the extra patterns, both discs also contain a wealth of information about home theater and some easy things you can do to improve your overall setup. DVE is a little more up to date. I also believe it's cheaper than Avia at most outlets.