They will start to develop the distinguishing characteristics upon age. Now, as to whether you will like said characteristics can only be determined by you. I, on the other hand, can discern these the different juices blindly right out of the box. That is not a super sense but it is definitely due to familiarity with the juices. Many of you have vaped BWB before and can attest to juices like Virgina and Backo being very close. Also, if you have ever vaped Vapor Station you will know that Texas and Tampa are quite similar, and at first, without the labels, you could easily think you were vaping one when in reality it was the other. I could go on, but I am sure you get the point.
Okay I lied....LOL. Isn't Gorilla juice just Bobas with a hint of banana? Yep, that's all it is. It's all about subtlety. If you want vastly different juices, I would suggest buying a non-net, a candy, drink, fruit, and a real tobacco--there should be no problem distinguishing those. Likewise, if you buy all coffee flavors, the similarity inevitability is probable.