It's not better than whey. It's just different. If I remember correctly, it's absorption rate is somewhere between whey and casein. Because it's pasteurized, salmonella is gone and avidin is negligible. I did read that the liquid is 20-30% more bioavailable than whey powder on other websites also.

WHEY CONCENRATE
Amino Acid Profile:
(per 100 grams of protein)

Alanine: 4,540 mg
Arginine: 2,209 mg
Aspartic Acid: 9,939 mg
Cysteine: 2,331 mg
Glutamic Acid: 11,411 mg
Glutamine: 4,417 mg
Glycine: 1,718 mg
Histidine: 1,840 mg
Isolucine: 5,767 mg
Luecine: 10,184 mg
Lysine: 8,466 mg
Methionine: 1,963 mg
Phenylalanine: 190 mg
Proline: 5,513 mg
Serine: 4,417 mg
Threonine: 6,012 mg
Tryptophan: 1,595 mg
Tyrosine: 2,822 mg
Valine: 5,399 mg

LIQUID EGG WHITES
Amino Acid Profile per 100g of Protein

Alanine 5.49g
Isoleucine 5.0g
Serine 6.07g
Arginine 4.54g
Leucine 6.80g
Threonine 3.41g
Aspartic Acid 6.09g
Lysine 4.64g
Tryptophan 1.18g
Cystine 1.88g
Methionine 3.01g
Tyrosine 3.21g
Glutamic 10.89g
Phenylalanine 4.94g
Valine 6.02g
Histidine 1.67g
Proline 2.92g
Glycine 2.89g