Prakriti is your nature — the balance of doshas you were born with, as steady as your eye colour. It is simply your baseline, with no 'better' or 'worse' to it.
Vikriti is your current state — how things sit today, shaped by season, stress, sleep, food and life. When vikriti drifts from prakriti, you might notice you feel 'not quite yourself'.
Most Ayurvedic lifestyle guidance is about gently nudging your current state back toward your nature — using routine, food, and practice. The dosha quiz here reflects tendencies; it is self-reflection, not a clinical reading of either prakriti or vikriti.