Modal reconstruction for the WMAP-9 bispectrum (left) and the Planck SMICA 2015 T-only bispectrum (right) plotted for the domain ℓ ≤ 450, using identical isosurface levels. Here, we employed the full 2001 eigenmodes for both the Planck analysis at ℓ_max = 2000 and for WMAP-9 analysis at ℓ_max = 600, but for comparison purposes we have only used the first 600 eigenmodes in order to obtain a comparable resolution. The main features in the WMAP-9 bispectrum have counterparts in the Planck version, revealing an oscillatory pattern in the central region, as well as features on the tetrapyd surface. The WMAP-9 bispectrum has a much larger noise signal beyond ℓ = 350 than the more sensitive Planck experiment, leading to apparent residuals in this region.