"better" is all proven in time IMO. UCAs are to correct caster for a lift and provide clearance for tires, plus they are stronger than the OEM in terms of the upper ball joint. Some have had issues (SPC) that were corrected, others are known weak (I've seen cheap china ones break welds at the inner joint). If they are well made, good geometry, and quality ball joints and bushings, most UCAs will serve just as well as the next.