NJT the x-caddis wing is tied longer than the compara emerger and it is not necessary to flair it 180?. It is meant to float low in the film and will be tough to see in fast water. Emerger wings can be tied forward like the Quigley cripple, rearward such as the the C/N compara emerger. To me emergers are tied to fish low and in the film, wet flies to me are emergers. I also think emerger is an overused term that obviously has a different meaning to an individual.