Rob, I know this is 6 days after your post, but I just decided today that I will be riding Comet this year for the first time.  June 4 I will ride it, week of June 25 I will be at Knoebels, and then I plan to ride Comet again mid-July.  Being familiar already with Phoenix, I am looking forward to great rides on both.  I will try to remember to post my opinions of one vs the other (although this post will most likely be closed by June 5).  Also, I already "know" that I will love Comet and wish it and Phoenix were closer to home. 
------------- 
Mother, did it need to be so high?