Pass coverage lapses is the difference between 2-2 and 4-0

Pkessling said

Found this:
His teams over the past few seasons have struggled in crunch time, particularly on defense. According to Fletcher Mackel, the Saints are 0-4 under Allen when their opponent starts a drive with between 2:30 and 1:00 left in the fourth quarter with the Saints ahead by 6 or less.
I remember a Tampa loss when the Saints were up by 16 in 4th Quarter, Brady’s last season.

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I mean, I would never trust anything Fletcher Mackel says. 😀

But that still doesn't answer the question of comparison or how good his defenses have been even when he was just the DC. Maybe they got worse when he became a HC, but I'd like to know that too.