Both should be fairly similar UCA's. Both have rubber bushings and literally both use HD standard BJs.
RL UCA's
https://www.readylift.com/upper-control-arms-dodge-ram-1500-4wd-2006-2018.html
RL says theirs is a propietary 1 ton BJ.
Replacement BJ
https://www.readylift.com/67-3412-replacement-ball-joint.html
Zone UCA's
https://zoneoffroad.com/products/ad...020-dodge-ram-1500-4wd?variant=33643110039640
Replacement BJ
https://www.sixityauto.com/moog-k80630-suspension-kit-3087003403.html
Don't know if the BJ's in both arms would be any different. They all have a similar price.
One is boxed, the other other is tubular. Don't know how both will index the BJ or which one is shorter or longer, any difference in offset etc until we get a pair side by side.
Rubber bushings are quieter and require no mainteance. Factory uses rubber bushings.
If you're offroading the truck rubber bushings will have some deflection if you're threading fast/hard whereas poly bushings will remain flat and given the way front UCA's articulate with an IFS application poly bushings are superior in that regards.
If you're just driving on the fwy and don't offroad much you won't notice a difference.
Not having to grease any zerks and zero noise/maitenance is also is more than welcome for most. With Poly you want to grease every 3-5k miles to avoid unwanted noises.
Also with Poly the bushings will spin in the sleeves/mounts so they don't bind if you're installing the UCA's with the truck in the air.
With Rubber you better tighten the bushings with the UCA sitting with the weight of truck on top and the truck sitting level where it'll normally rest to avoid binding and damaging the bushing.
Not a big deal either way just something to keep in mind at install time.
I had Zones for around 30k miles or so, they're nice UCA's and super sturdy. I replaced them recently with Icons Delta Joint because i wanted better UCA's for my needs. Better in the sense of running poly bushings with a more flexy BJ. My setup is a little more offroad oriented than normal and it also rides super comfortable on/offroad so i wanted to keep improving what i have.
Zones were my first ever attempt at running aftermarket front UCA's with rubber bushings and standard BJ's. I'm used to Total Chaos and Camburg uniballs and poly bushings.
I asked Nick for the TC ones but he doesn't sell them, Nick got me a deal with Icons so Icon i went. first time ever as well running the Delta Joints. So far very good and all i can say is I should have started with the Icons.
Take care and have fun.