Read this thread, Paul. I see only one person has clicked on the link Howard posted; hopefully that one click was yours. That is the thread on Wine Berserkers regarding the red wines of the Loire Valley.
And this thread, as far as I know, is the thread on Wine Bererkers for the white wines of the Loire Valley.: Your Classification For Loire Whites
Read these two threads, take Howard’s suggestion to buy and taste, and then post your impressions and specific questions in those threads.
I promise this will yield far better information than the questions you’re currently asking.