Thanks for the kind words, JamieM, but I am faaaarrrrr from a goldfish specialist. There are many, many people on this forum who know far more about goldies than I. I just love 'em!
Star- it sounds like you do, indeed, have a male moor if he has "breeding stars" on the gill plates. They really don't look like anything else. The second give away is the aggressive chasing in the tank. It could be that you have an adolescent male that is "sowing his oats," by chasing the comet, or it could be male-to-male territorial aggression. I have seen both. If it's the latter, and your tank is big enough they'll work it out on their own. Jamie is correct that spawning with goldfish is UGLY (and makes a mess of the tank. I have a breeding pair in spawn right now. No discretion, whatsover. Even my snails are covered with eggs.
) If your male is the fancy and the comet is the female, she does have the advantage of speed. No worries. Just keep an eye on the tank. Don't worry about names. I have a female panda that I was SURE was male, so I named her Zeus. She's still Zeus. I don't think she knows the difference. 
Star- it sounds like you do, indeed, have a male moor if he has "breeding stars" on the gill plates. They really don't look like anything else. The second give away is the aggressive chasing in the tank. It could be that you have an adolescent male that is "sowing his oats," by chasing the comet, or it could be male-to-male territorial aggression. I have seen both. If it's the latter, and your tank is big enough they'll work it out on their own. Jamie is correct that spawning with goldfish is UGLY (and makes a mess of the tank. I have a breeding pair in spawn right now. No discretion, whatsover. Even my snails are covered with eggs.