Transparent Lace:
Thicker and provides more durability.
Small/Medium knots, not as easy to bleach compared to the HD lace.
Blends well with a variety of skin tones.
Lace is lighter in color.
HD Lace:
Thinner and finer, less durable but more realistic.
Small knots, easier to bleach.
Stretchy, soft, delicate.
Melts better in the skin, melts well with all skin tones.
Would recommend HD for darker skin tones to achieve a seamless melt.
Recommend 6*6 closure for frontal illusion.