As a thumb rule, the tests used to check burned discs can give you a rough (I mean really approximate, not mathematically exact) estimation of how long a disc will remain readable.
In fact, because of the nature of writable media, these tends to degrade in time. The more errors there are on a burned disc, theoretically, more short is its readability in time.
So, is preferable to have the lower amount possible of errors on burned discs.
Bear in mind, however, that there is no mathematical correlation between the amount of errors and readability in time of a burned disc. In fact, the most important factor is the stability of organic substrate burned by laser. Good quality discs have a very stable dye and the disc will remain readable for a long time. Low quality media use lesser stable dye so these will degrade fairly quick in time and the disc can become unreadable after few months.
In general terms, a disc with more errors often (not always) is more difficult to read compared to a disc wit less errors, because these errors must be corrected before data can be retrieved. All drives are provided of error corrections mechanisms, so these errors are corrected without the user noticing it.
I said "not always" because it is very important also the exact location of the errors. A disc with a single error located in a specific place in the disc sector can be completely unreadable, and a disc with thousand of errors can still be perfectly readable if none of these errors is located in a critical place.
Too bad, recently most drives able to perform reliable tests of burned media are difficult to find, because most producers stopped to manufacture these drives
So, if you can find a Liteon drive with a mediatek chipset then you can run quality tests. The alternative is running the reading test only, that is reliable enough in my opinion to evaluate a burned disc. If the reading graph is not smooth, then the disc has too much errors and should be trashed.
If you can find a very picky drive, testing your burned discs in that drive is the best way to find if a disc was burned good. If a picky drive can read without problems that disc, then every drive will be able to read that disc. If you use for tests a drive that can read everything, even heavily scratched discs, the test will be not reliable because is highly probable that another drives will be not able to read that disc.
If I'm not wring, xbox drives are pretty picky, so if a disc is readable in the xbox, then you can be sure that the disc was burned good
I hope I answered your question and not confuse you more :o