What's the difference between 432 Hz and 528 Hz?
Short answer: 432 Hz is an alternative tuning many people find warm and grounding; 528 Hz is a Solfeggio tone called the 'love frequency', used for heart-focused meditation.
Claims about either one physically healing the body aren't backed by strong scientific evidence. The honest difference is how they feel to you.
Try both for five minutes each with headphones and notice which one relaxes you more.