Tests UCM (Omegaₘ=0. 3166, w=-1) against DESI DR2 BAO (Abdul-Karimet al. 2025), 13 data points, z=0. 30-2. 33. chi²/dof=24. 0/13=1. 85, ΔBIC=+2. 56. The UCM is 2. 2sigma from the DR2 best-fit Omegaₘ=0. 2975, identical to Planck ΛCDM (2. 1sigma). The DESI-Planck tension affectsboth models equally.
Norbert Prebeck (Sat,) studied this question.