The first set, the Morbid Legionary set, has a clear bio-mechanical look to them, where as the Mutated set goes for a full-organic appearance. Both sets are ideal for Nurgle-dedicated forces, hence why they appear in this review as a pair. Both sets retail at £5.05, and both come with 10 pads: two copies of five designs.
On a model they look much better, and blend in with existing Nurglesque features. For illustration purposes I have used Spellcrow Plague Legion models, as it better shows this blending of designs than on a Plain-Jane marine model.