I think they are very different discs and could see carring both. I carry a x xs which I would say is similar to a leo and I use it alot for tunel and low ceiling shots. the rr is for big turnover and monster hyzer flips. one of the longest throws i have ever had was with an echo star rr.
ringer, aero, breaker, glide, sabre, valk, avenger, flick, helios, teedevil, halo
i have seen monkey sh!t fights at the zoo more orginized then this.