What's the difference between pestilential and plaguey?

Pestilential

Definition:

• (a.) Having the nature or qualities of a pestilence.
• (a.) Hence: Mischievous; noxious; pernicious; morally destructive.

Example Sentences:

• (1) Phosphofructokinase activity from pestilential microbe was inhibited by ATP, citrate, 3-phosphoglycerate, by Ca2+ and Mn2+.
• (2) Synthesis of phosphofructokinase was decreased in pestilential microbe if cultivation temperature was increased from 28 degrees to 37 degrees.
• (3) Is that useful cliche, “ordinary British working people”, sinking beneath rising waters of oleaginous, pestilential filth?

Plaguey

Definition:

Example Sentences: