I bought some variabilis from someone. They told me 1 of them was more yellow than the rest. I did some research before I bought the group of 4 and found out about imitators. I purchased the frogs and continued researching. I immediately seperated 3 frogs from the 1 that seemed different. One thing I read is that the variabilis have black spots on the nose, but these spots cannot be seen from above. The imitators supposedly have nose spots you can see from above. Where I get thrown off is that the information I found conflicts. Some say you can clearly tell, some say that you cannot tell the difference. Please let me know what you think. Personally, I think I have 3 variabilis and 1 imitator.