training collar for Lab
E-Collars are a broader term. If a training collar uses electricity, then you can call it an E-Collar. Under this category, we have spray collars, vibration collars, and shock collars.
Collars that use electricity to directly induce an irritating sensation are called shock collars. They can be in the form of training collars like the ones in this list, bark collars that chiefly only help with excessive barking or fence collars that only activate when your dog goes somewhere that triggers the stimulation.