Yes, I've made tinctures and that is one of many products available in the stores.
With edibles, your liver converts the THCa or THC delta-9 if decarboxylated and converts it to THC delta-11. This is a form of THC you won't experience by smoking, it is something only the liver and science can do. There are some people whose liver does not convert this and they feel no real effects. There are also other people, regular smokers like myself that don't notice much of a difference until you get in the 100mg range.
Tincture though, if held under the tongue enters the blood system much faster and does not go through the digestive process. So, It might be one is a heavyweight and the other is a lightweight. Not uncommon. My buddy needs a 5mg edible, I need 100mg and we both wind up in the same place.