Comparison between the mid-IR colors of Seyfert galaxies listed in the Turin-SyCAT and the γ-ray blazars of the Roma-BZCAT. Seyfert 1 galaxies tend to be more similar to blazars in their mid-IR emission, in particular when compared with BZQs that have the same infrared and optical properties of normal quasars, while Seyfert 2 galaxies show mid-IR properties similar to BZQs only in the W2–W3 vs. W3–W4 diagram.