The Pegasus Plus is the light one in the Pegasus family. Full-length ZoomX foam under a 10 mm drop makes it bouncier and around 50 g lighter than the standard Pegasus, which is what turns it from a workhorse into a shoe you can pick the pace up in. Use it for steady runs, tempo efforts, and the long run when you want the second half to feel quick.
It is not a super-shoe. There is no plate, so it will not hold a race pace for you the way a carbon racer does, and ZoomX wears out faster than the firmer foams in a daily trainer.
It is not the shoe for every easy mile either. Keep a sturdier trainer for recovery days and save this one for the days with intent.