The Catty is more durable and is pretty balanced, although I think mine was slightly endloaded. The Frenzy comes in both balanced (14") and end loaded (12.5") models. The Frenzy will definitely get hotter quicker and it feels better too. The Catty has a small SS and if you miss it you will know it. If you can't hit the SS on a Frenzy it is time to retire. The only thing anyone can say bad about the Frenzy is that some seem to not last as long as others. Mizuno CS is much, much, much better than LS though so you won't have any issues getting a Frenzy in return if you break yours. The Mizuno OG Wrath is hotter than the Frenzy but you won't be able to fidn one as easily.
My Frenzy > My SCN9 and that's why I don't have a SCN9 anymore.
