From the manufacturer:
Embroidery or crewel needles have long eyes to take one or more threads of standard cotton or ribbon. Mainly used for either cotton or ribbon embroidery. Gold eye needles: 3/9. 16 needles included.
Milliners needles are long needles with round eyes excellent for pleating, ribbon embroidery and embellishing on bonnets, hats, etc. Size: 3-9. 16/package.