We are late but the Chevy ZR2 Photo of the Month Contest is live! Please check it out at the following URL: Chevy ZR2 Photo of the Month Contest - January 2025 (You can dismiss this message by clicking the X in the top right hand corner of this notice.)
If you use your truck more for daily driving, I'd stay away from any UCA with solid (uniball or heim joints) mounting points. Those type of mounting systems will make for a harsher ride. If you're a serious off-roader and plan on doing regular maintenance to keep those joints clean and don't mind sacrificing ride quality for suspension performance, then both of those billet UCAs are excellent choices. For the people like me, that do more on road than off-road driving I'd stick to either a Dirt King or Cognito UCA with a ball joint and either polyurethane (Cognito) or Probearing SilentSpin bushings (Dirt King). As far as the Peak 2.25" lift, in my onion that is an outstanding kit when paired with the Dirt King or Cognito ball joint UCAs.
I've had the Peak 2.25 lift with both Cognito (on my 2022 ZR2) and Dirt King (on my 2024 ZR2) ball joint UCAs and can tell you there is no sacrifice in ride quality. And, you'll still get the same amount of suspension travel as the uniball mount UCAs.