Because I'm bored, let's have a fun mental exercise

So, I love my two cats, but they do NOT love each other, so we keep them at opposite ends of the house, with the kitchen door being the barrier. Sometimes, Layla sneaks into the kitchen, and sometimes Hairy is in there, and they go at it, and I have to stop them. But what if instead, I were to allow...

The Contestants:
Aliases: Lord Fuzzy, Fluffy Boi, Snugglepurr
Age: 6
Weight: 12 lbs
Advantages: Spent two years of his life as an alley cat in Nevada. Held his own against all kinds of urban wildlife.
Disadvantages: Too chill to start a fight.

Aliases: Pretty Kitty, Sassypants, Lady Layla
Age: Unknown
Weight: 8 pounds soaking wet
Advantages: Instigates most confrontations with Hairy; never backs down.
Disadvantages: Lifelong housecat, less muscle mass.

Who will win?

DISCLAIMER: I am never going to let my cats fight just to settle this, so any answers would be pure speculation.