What's the difference between beardless and whiskerless?

Beardless

Definition:

(a.) Without a beard. Hence: Not having arrived at puberty or manhood; youthful.
(a.) Destitute of an awn; as, beardless wheat.

Example Sentences:

(1) Other abnormal features in the family included precocious adrenarche, beardless males, eunuchoidism, and prepubertal grand mal seizures.
(2) A zoometric and yield study of the domestic Salvadorean hog in its three representative types: "chino" or beardless (CH), "negro" or black (N) and "parchado" or patched (P) in the birth-to-sacrifice stages, as well as in the carcasses, was carried out.
(3) Four of the species extinct in England also became extinct globally: the penguin-like great auk; Mitten's beardless moss; York groundsel, a weed only discovered in the 1970s; and the Ivell's sea anemone, last seen in a lagoon near Chichester.
(4) You may not agree with beardless election winners such as Barack Obama, Bill Clinton, George W Bush and Tony Blair, but there's a reason that William Howard Taft was the last US president with facial hair in 1913: beards were seen as being the preserve of hippies and communists, shaving a sign of respectability.

Definition:

Example Sentences:

(1) Homeland Security chief Michael Chertoff's whiskerless visage was ubiquitous on cable news.
(2) The tail fibers of mutant whiskerless (wac) phage still retract under the first two conditions, but not the last three.