Mass–radius relation of the theoretical models vs. observed data. The green curve corresponds to the MFTQCD quark EoS, with ξ = 0.003658 MeV⁻¹ and B_QCD = 62 MeV fm⁻³. The blue curve depicts the results for the NJL CFL+vector interactions EoS with B₀ = 57.3 MeV fm⁻³ and G_V/G_S = 0.5. Two anisotropic models corresponding to the Thirukkanesh–Ragel–Malaver ansatz, both with Δ = 100 MeV and m_s = 150 MeV appear in red (corresponding to B = 57.5 MeV fm⁻³) and black (B = 70 MeV fm⁻³). The dotted sequence is the Δ → 0 for the same anisotropic models with B = 70 MeV fm⁻³, showing that the downward shift in the stellar sequence curves is not dramatic and may be viable as a model of the new object. Data rectangles are 1σ estimates for PSR J0030+0451 (purple), PSR 0740+6620 (green) and the recently reported HESS J1731−347 (blue).