Validity Guarantee Vs. Personal Guarantee

Is anyone familiar with the differences between a Validity Guarantee and a Personal Guarantee, specifically around the levels of recourse a lender/ investor has with a VG?

My high-level understanding is that a VG provides the lender/ investor recourse in the event of fraud, but omits the borrower's personal assets as the investment collateral.

Any insight or experience with VG's versus PG's would be very helpful. Thank you!