~に欠ける・にかける: to lack an abstract thing (experience / confidence / creativity / trust)
足りない・たりない: To lack a physical thing (money, time, a soup needs more garlic) Also implies that there is a specific amount that is required, which に欠ける does not.
~に欠ける・にかける: to lack an abstract thing (experience / confidence / creativity / trust)
足りない・たりない: To lack a physical thing (money, time, a soup needs more garlic) Also implies that there is a specific amount that is required, which に欠ける does not.