Left: blind SZ flux of the SPT clusters extracted from the public SPT data with our modified MMF3 algorithm as a function of the SZ flux Y^0.75 published by the SPT collaboration (Bleem et al. 2015a). There is good agreement at low flux, but our flux is systematically overestimated at high values (Y^0.75 SPT > 2 × 10⁻⁴ arcmin²). Right: ratio of the two flux values as a function of the flux published by the SPT collaboration. Our flux is in good agreement for Y^0.75 SPT < 2 × 10⁻⁴ arcmin², but it is on average 1.1 times Y^0.75 SPT for Y^0.75 SPT > 2 × 10⁻⁴ arcmin². Red dots are individual clusters. Blue diamonds are weighted averages. Thick error bars display 68% statistical errors, and thin error bars show 68% errors obtained by the bootstrap method.