Mountain Dew MDX
$1.29 (here anyway)
Taste - Moreso like a further concentrated Mountain Dew, except, more green than regular MD.
Effect - Not much really, just a glorified, more expensive Mountain Dew.
Rating - 5/10 (the price isn't worth it)
Mountain Dew AMP
Taste - My favorite energy drink, because it's flavor is so distinct from the rest of the energy group crowd. Kind of tangy, and doesn't leave that chemically aftertaste that some other energy drinks do.
Effect - Well, it doesn't contain as much of those "special herbs" as others, nor does it have an overload of B vitamins (maybe 30-40% DV in one can, compared to a monsters 150-200%, or a sobe superman's astonishing 500% per can). The effect = not as much buzz, which is good, since I dislike feeling queasy and then shaking after an energy drink, which only happens occaionally, but enough to make me stop drinking them. Of course, MD AMP's take care of the problem by not having those symptoms for me, ever.
Rating - 8.5/10 For the unique flavor.