Surviving Super Jungles are not typically fertile. There is no known female specimen capable of breeding and only one male that I am aware of that has potentially sired a litter (although the results of that litter are as yet unknown).
There IS a visual difference though. The Super Jungles are very bright and clean and the pattern is usually amazing - either incredibly wild or very reduced. A super can only result from a Jungle x Jungle pairing though and most breeders will avoid doing that as most of the babies will not survive.