Phoenician - 22 letters, no vowels; Greek 16 letters including vowels.
By having symbols to spell out sounds, just as our alphabet today does. Our alphabet is a descendant from the Phoenician one, via Greek and Latin which copied the Phoenician system.
Sixteen symbols, no vowels.
The Greek alphabet was based on the Phoenician alphabet.
The Phoenician alphabet was the inspiration for the Greek alphabet.
The Phoenician Alphabet
Vowels.
Because the Greek alphabet was adapted from Phoenician, which began with Alef. (Nobody knows why the Phoenician alphabet begins with that letter).
The Greek alphabet was based on the Phoenician alphabet.
The Greek alphabet, an evolution of the Phoenician. An evolution of the Greek alphabet was the Latin.
Both are phonetic systems, however the Phoenician Alphabet has no vowels, and it more accurately called an "Abjad" rather than an "Alphabet".
Early Greek merchants adapted the Phoenician alphabet for their own use.
It's really not similar at all. The Phoenician alphabet has 22 consonants and no vowels. The only similarity is that the English alphabet is a version of the Latin alphabet which was adapted from the Greek alphabet alphabet which was adapted from the Phoenician alphabet.
The Phoenician alphabet is real, and formed the basis of the Greek and Roman alphabets, and today's European alphabets.
The Latin letter a came from the first letter of the Greek alphabet (alpha) which came from the first letter of the Phoenician alphabet (alef), but nobody knows why alef is the first letter of the Phoenician alphabet.