Neither of the staircases are safe as: 1. Riser heights are different outside the normal range 2. Treads are too narrow at the inside of the corners 3. Handrails, while securely mounted, aren't continuous 4. Inadequate head clearance at the basement stairs They are a trip and fall hazard. Consult a stairway guy and repair/replace as you and he agree would be best for your family and guests safety. Your family, your guests, your insurance, your choice. For more information, follow the link below: https://www.inspectorsjournal.com/forum ... SCREEN.pdf