I see on the website you can configure a ruckus to as little as 26 oz. And the anti x is 23 does 3 oz make that big of a difference?
Defiance's lineup is such a circus of new names and tweaks it's hard to keep them all straight. Ruckus used to basically be a cheaper version of their deviant tactical with less customization offerings but with guaranteed headspace. Now looking at the ruckus lineup there's a pile of different configurations including hunter and ultralight versions. I would bet many folks are like me and think tactical version when they hear ruckus.
I've never bought a defiance due to some common reported downsides on the internet the validity of which i can't say:
- Tight clearance specs that dont play well with dust/debris
- There was discussion that this was changed in some actions, heck if I know though
- The Anti models bolt handle didn't play nice with scope clearance - there are options to change it out though
- The deep fluting on underside of bolt (primarily Anti models) made for less than smooth feeling bolt travel
- When they got acquired by Bob Beck prices went through the roof. They seem to have went back down to match the market now
All that said, the smiths who seem to me to be most particular about everything being straight, action timing, ignition system function, and generally peak precision performance (Ryan Pierce, Alex Wheeler, Taylor Stratton) all seem to be fond of Defiance actions. Those are the guys that I've seen mention spending time further tweaking expensive custom actions to get these things perfect when most 'smiths seem let em be and screw a barrel on.
And now they have the renegade which just seems like it's the new Anti? No idea what the difference between it and the ruckus ultralight are beyond maybe a couple different bolt and mag well cut options on the ruckus (which again, used to be the no frills/options line).
If I were going to buy a defiance for hunting, i'd inquire about the clearance specs on different models for playing nice with dirt/debris.