Some juices taste better using standard atomizers, some taste great in cartomizers. It's one of those things I cannot explain.
One thing I do know, is that using pure VG juices in cartomizers generally leaves me unsatisfied, unless I let the freshly filled cartomizer sit overnight before vaping.
Lastly, your tastebuds are going through HELL right now, and as time goes on, your taste buds will return to normal, and even change.
Also, COOL carts and WOW carts are 2 different beasts. If you were to vape the 555 COOL carts, your experience will be much different than the 555 WOW carts. I find that the COOL carts to be a much mellower flavor, while the WOW carts are much heavier.