Sublimated is best for full-color designs since they can be double sided & for pairing with a sewn-on medal style.
Imprinted is chosen when a design is text, or a simple image, & only one or two colors will be used.
Standard neckbands are solid colors.
To chose which style works best, please discuss with your customer if they need a design, what it will look like, and how many colors will be used.