The Petzl GriGri+ is more durable and has more safety features

"You figured out that if you go past the panic function, then you're just lowering," Roetzel continues. "When you feel the click you've [partially] activated the anti-panic feature. You over-rode it. Like when rappelling, if you don't have a lot of weight on the rope, you'll keep activating that panic feature so you have to override it." Because of this addition, there's a sweet lowering spot that descends the climber at a controlled rate.