Variants give different directions to choose from: Chocolate & Cherry combines chocolate and cherry, Garlic & N-Butyric combines garlic and fatty acid, and Hot Fish and Hot Mango mean chili fish or spicy mango. Liver is the variant with fraction. The difference is in the said aromatic combination and does not give reason to expect the same result in advance in every fishing venue.
The critical balance is checked with the finished leader because the change of hook affects the behaviour of the dumbbell. Do a sample in a shallow pot or off shore and watch the whole combination stand. If you change size or weight to another item, repeat the check; so you appreciate the actual rig, instead of relying only on the inscription on the packaging.
When comparing fragrances keep the other conditions the same: leader, hook and way of submission. Change only the selected option and note which distance and in which section it was used. Thus you get useful observation for the specific fishing trip without turning a single peck into a universal conclusion for the whole set.
Open only the packaging you are working with and do not mix the different markings in one box. The bright color is a visible mark of the dumbbell, but the decision should also take into account the balance of the finished rig. For an orderly feeder box method, it is enough for each combination to remain clearly identifiable, and the choice to change consistently according to the water observed.
For the feeder outing, I'd start from Fishing accessories, as I check what else I need to agree with the rig. Then I open Feeders and bait for groundbait fishing and direct the choice to the method itself. If I need a more general comparison I go through Feeding and baiting and judge against the watershed plan.