I can because of my age, unfortunately, do not compare with the original Fanta, but the taste of Fanta Classic is definitely different and in my opinion even better than in the "normal" Fanta.
The label reads: Inspired from the original ... recipe with 30% whey product ......
Means to me: does not match the original, probably are any components that were included previously, now no longer allowed.
In addition to the whey product that surprised me the amazing included Apel extract.
Conclusion: tastes better than the "normal" Fanta, is less sweet.
A star deduction there because of the quite steep price.
One more thing to MHD: bought in early April: MHD August 2015