Ignoring the first three sentences that make very little sense other than repeating what I said in a circuitous way, not to mention grammar...
You want something concrete? Listen to Images & Words. Pretty good album, to be honest. Now listen to just about any "prog metal" band from Italy, or anyone whose name has Ivory, Dreams, Liquid, Black, or some other color in their name. These bands have in their descriptive blurbs the word "clone". Essentially, they emulate Dream Theater. 99% of these bands are shit on a stick. A few are half decent, and those are the ones who are just plain better than Dream Theater to begin with. Now, listen to Systematic Chaos. If you can swear it sounds significantly different from one of those bands, I'll give you a cookie. It's the derivative degeneration property associated with facsimile. Copy the copy, and copy that copy, and sooner or later all you have is static and unreadable, or in this case, unlistenable.