What's the difference between a corset and a waist trainer ? And which one is better to use ?

Waist Training Part One: What, Why, How? — Of Corsets and Cosplay

Mesh Corset Steel Boned Corset Womens Underbust Corset Waist

Plus Size Latex Waist Training Corsets Wholesale Trainer, 57% OFF

Black Fine Mesh No Line Corset, Hourglass Silhouette, Regular

I Have a Short Torso, What is the Best Waist Trainer?

Sateen Conical Rib Longline Waist Trainer

Plus Size Latex Waist Training Corsets Wholesale Trainer, 57% OFF

Which is the Best Waist Trainer? – BVVU

YADIFEN Corset Waist Trainer for Women, Latex Waist

Guidelines on Using Waist Trainers: how tight is too tight