I keep both together and when referring to them I just call the G. tile the "FW moray." Although it is funny because G. polyuranodon is referred to as the 'freshwater moray' in old articles and literature; but other than those neo has posted pics of on here, don't know of too many people that have kept that species.
I'm still looking for those or for E. rhodochilus, which I haven't seen in person in about 2 or 3 years.