The results are not horribly surprising, the SM7B has the same capsule as the Beta 57 which is awfully similar to the 57/58.But notice there's a 10-15dB boost b

The results are not horribly surprising, the SM7B has the same capsule as the Beta 57 which is awfully similar to the 57/58.But notice there's a 10-15dB boost below 80Hz on the SM7. They also didn't analyze the off axis response or proximity effect - the vents on the enclosure impact both drastically. Don't look at a frequency response chart like that for insight. Anyone who has recorded a bass cab or kick drum with an SM7B would look at you sideways if you tried to use a 58 as a replacement unless you were really in a pinch.