Absolute differences between the 17.4 M_⊙, 17.15 M_⊙, 17.0 M_⊙, and 16.9 M_⊙ genuine single star's p mode frequency ${\nu }_{n_{\mathrm{p}}}^{\text{s}}$ and the 16.9 M_⊙ 3D MHD (MHD), entropy-sorted (ES), PyMMAMS (PM), and fast-accretion (FA) merger product's frequency ${\nu }_{n_{\mathrm{p}}}^{\text{m}}$ per radial order n_p, in the absence of rotation (top panel). The bottom panel shows the difference in p-mode frequencies per radial order for p modes computed with the 3D MHD merger model as input in GYRE and those computed with the respective 1D models used as input.